UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                            Washington, D.C.  20549


                                  SCHEDULE 13D



                   Under the Securities Exchange Act of 1934


                          Summagraphics Corporation
                   8500 Cameron Road,  Austin, Texas 78754
- -------------------------------------------------------------------------------
                                (Name of Issuer)

                     9.25% Secured Convertible Debentures
- -------------------------------------------------------------------------------
                         (Title of Class of Securities)

                                   865906101
      ------------------------------------------------------------------
                                 (CUSIP Number)

        Frank H. Menaker, Jr., Vice President and General Counsel,
              Lockheed Martin Corporation, 6801 Rockledge Drive,
                   Bethesda, Maryland  20817 (301) 897-6125
- -------------------------------------------------------------------------------
(Name, Address and Telephone Number of Person Authorized to Receive Notices and
                                Communications)

                                  March 19, 1996
      ------------------------------------------------------------------
            (Date of Event which Requires Filing of this Statement)


If the filing person previously filed a statement of Schedule 13G to report the
acquisition which is the subject of this Schedule 13D, and is filing this
schedule because of Rule 13d-1(b)(3) or (4), check the following box [ ].

Check the following box if a fee is being paid with the statement [X].  (A fee
is not required only if the reporting person: (1) has a previous statement on
file reporting beneficial ownership of more than five percent of the class of
securities described in Item 1; and (2) has filed no amendment subsequent
thereto reporting beneficial ownership of five percent or less of such class.)
(See Rule 13d-7.)

Note:  Six copies of this statement, including all exhibits, should be filed
with the Commission.  See Rule 13d-1(a) for other parties to whom copies are to
be sent.

*The remainder of this cover page shall be filled out for a reporting person's
initial filing on this form with respect to the subject class of securities, and
for any subsequent amendment containing information which would alter
disclosures provided in a prior cover page.

The information required on the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the Securities Exchange Act of
1934 ("Act") or otherwise subject to the liabilities of that section of the Act
but shall be subject to all other provisions of the Act (however, see the
Notes).

 
                                  SCHEDULE 13D
CUSIP No. 865906101                                           Page  2 of 6 Pages
- ---------------------------                                   ------------------

      1    NAME OF REPORTING PERSON
           S.S. OR I.R.S IDENTIFICATION NO. OF ABOVE PERSON
           
           Lockheed Martin Corporation
           I.R.S. Employer Identification No. 52-1893632
- -------------------------------------------------------------------------------
      2    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP  (a) [ ]
           
           NOT APPLICABLE                                    (b) [ ]
- -------------------------------------------------------------------------------
      3    SEC USE ONLY
- -------------------------------------------------------------------------------
      4    SOURCE OF FUNDS
           NOT APPLICABLE
- -------------------------------------------------------------------------------
      5    CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT 
           TO ITEMS 2(d) or 2(e) [ ]
- -------------------------------------------------------------------------------
      6    CITIZENSHIP OR PLACE OF ORGANIZATION
 
              Maryland
- -------------------------------------------------------------------------------
         NUMBER OF           7         SOLE VOTING POWER
          SHARES                       0*
       BENEFICIALLY  ----------------------------------------------------------
         OWNED BY            8         SHARED VOTING POWER
           EACH                        0*                 
         REPORTING   ----------------------------------------------------------
          PERSON             9         SOLE DISPOSITIVE POWER
           WITH      ----------------------------------------------------------
                            10         SHARED DISPOSITIVE POWER
                                       0*
===============================================================================
      11               AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING 
                       PERSON
                       0*
- -------------------------------------------------------------------------------
      12               CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES 
                       CERTAIN SHARES  [ ]
- -------------------------------------------------------------------------------
      13               PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
                       0*
- -------------------------------------------------------------------------------
      14               TYPE OF REPORTING PERSON*
                       CO
- -------------------------------------------------------------------------------
        * Pursuant to the terms of the Plan of Reorganization and Agreement for
        the Exchange of stock of CalComp Inc. for stock of Summagraphics
        Corporation, (the "Exchange Agreement"), Summagraphics Corporation
        issued to Lockheed Martin its 9.25% Secured Convertible Debenture (the
        "Debenture"). Upon an Event of Default under the Debenture, Lockheed
        Martin would be entitled to convert all or any portion of the principal
        amount of the Debenture plus accrued and unpaid interest thereon into
        shares of Summagraphics Corporation Common Stock at a conversion rate of
        $2.00 per share; provided that the conversion price is increased to
        $3.00 per share under certain circumstances. Any occurence of an Event
        of Default under the Debenture is outside the control of Lockheed
        Martin. Accordingly, the filing of this Schedule 13D is not an admission
        that Lockheed Martin is the beneficial owner of any shares of Common
        Stock into which the Debenture is convertible and Lockheed Martin
        Corporation expressly disclaims beneficial ownership of such shares of
        Common Stock. The aggregate amount of Common Stock of Summagraphics
        Corporation which Lockheed Martin would have a right to obtain should an
        Event of Default occur and assuming conversion of only principal would
        be 1.25 million shares of the approximately 5,927,293 shares of Common
        Stock of Summagraphics Corporation which would then be issued and
        outstanding or 21% of such Common Stock then issued and outstanding.
================================================================================

 
                                  Schedule 13D
                                  ------------

Item 1.   Security and Issuer.
          ------------------- 


     9.25% Secured Convertible Debenture
     Summagraphics Corporation
     8500 Cameron Road
     Austin, Texas 78754


Item 2.   Identity and Background.
          ----------------------- 

     Lockheed Martin Corporation
     6801 Rockledge Drive
     Bethesda, Maryland  20817

     Incorporated in Maryland.

     Lockheed Martin Corporation ("Lockheed Martin") is a diversified enterprise
principally engaged in the conception, design, manufacture and integration of
advanced technology products and services for the United States government and
private industry.  Lockheed Martin also manages significant facilities for the
Department of Energy and produces construction aggregates and specialty chemical
products.  CalComp Inc. is a wholly owned subsidiary of Lockheed Martin and is a
supplier of input and output computer graphics peripheral products.

     Lockheed Martin has not, during the last five years, been convicted in a
criminal proceeding.  On January 27, 1995, Lockheed Corporation, one of the
corporations that combined to form Lockheed Martin entered into a plea agreement
pursuant to which Lockheed Corporation agreed to plead guilty to one count of
conspiring to violate the bribery provisions of the Foreign Corrupt Practices
Act and conspiracy to falsify its books, records and accounts.

     Lockheed Martin has not, during the last five years, been subject to a
judgment, decree or final order in joining future violations of, or prohibiting
or mandating activities subject to, federal or state securities laws or finding
any violation with respect to such laws.

                                  PAGE 3 of 6

 
Item 3.   Source and Amount of Funds or other Consideration.
          ------------------------------------------------- 

     Not Applicable.


Item 4.   Purpose of Transaction.
          ---------------------- 

     Pursuant to the terms of the Plan of Reorganization and

Agreement for the Exchange of stock of CalComp Inc. for stock of Summagraphics
Corporation, (the "Exchange Agreement"), Summagraphics Corporation issued to
Lockheed Martin its 9.25% Secured Convertible Debenture (the "Debenture").  Upon
an Event of Default under the Debenture, Lockheed Martin would be entitled to
convert all or any portion of the principal amount of the Debenture plus accrued
and unpaid interest thereon into shares of Summagraphics Corporation Common
Stock at a conversion rate of $2.00 per share; provided that the conversion
price is increased to $3.00 per share under certain circumstances.  Any
occurence of an Event of Default under the Debenture is outside the control of
Lockheed Martin.  Accordingly, the filing of this Schedule 13D is not an
admission that Lockheed Martin is the beneficial owner of any shares of Common
Stock into which the Debenture is convertible and Lockheed Martin Corporation
expressly disclaims beneficial ownership of such shares of Common Stock.  The
aggregate amount of Common Stock of Summagraphics Corporation which Lockheed
Martin would have a right to obtain should an Event of Default occur and
assuming conversion of only principal would be 1.25 million shares of the
approximately 5,927,293 shares of Common Stock of Summagraphics Corporation
which would then be issued and outstanding or 21% of such Common Stock then
issued and outstanding.



Item 5.   Interest in Securities of the Issuer.
          ------------------------------------ 

          Under the Exchange Agreement, Summagraphics Corporation issued to
Lockheed Martin the Debenture.  Upon an Event of Default under the Debenture,
Lockheed Martin would be entitled to convert all or any portion of the principal
amount of the Debenture plus accrued and unpaid interest thereon into shares of
Summagraphics Corporation Common Stock at a conversion rate of $2.00 per share;
provided that the conversion price is increased to

                                  Page 4 of 6

 
$3.00 per share under certain circumstances.  Any occurence of an Event of
Default under the Debenture is outside the control of Lockheed Martin. 
Accordingly, the filing of this Schedule 13D is not an admission that Lockheed
Martin is the beneficial owner of any shares of Common Stock into which the
Debenture is convertible and Lockheed Martin Corporation expressly disclaims
beneficial ownership of such shares of Common Stock.  The aggregate amount of
Common Stock of Summagraphics Corporation which Lockheed Martin would have a
right to obtain should an Event of Default occur and assuming conversion of any
principal would be 1.25 million shares of the approximately 5,927,293 shares of
Common Stock of Summagraphics Corporation which would then be issued and
outstanding or 21% of such Common Stock then issued and outstanding.

     Pursuant to and subject to the terms and conditions contained in the
Exchange Agreement, Summagraphics Corporation will issue to Lockheed Martin a
number of shares of its Common Stock which, after such issuance, will be equal
to 89.7% of the issued and outstanding common stock of Summagraphics on a fully
diluted basis, in exchange for all of the outstanding capital stock of CalComp
Inc.  As a consequence of the Exchange Agreement, Lockheed Martin would acquire
control of Summagraphics and CalComp would become a wholly owned subsidiary of
Summagraphics.


Item 6.   Contracts, Arrangements, Understandings or Relationships with Respect
          ---------------------------------------------------------------------
          to Securities of the Issuer.
          --------------------------- 

     Not Applicable.

Item 7.   Material to be Filed as Exhibits.
          -------------------------------- 

     a.  See Debenture attached as Exhibit A.

     b.  See Plan of Reorganization and Agreement for the Exchange       
         of Stock of Calcomp Inc. for Stock of Summagraphics
          Corporation attached as Exhibit B.

                                  Page 5 OF 6

 
                                   SIGNATURE


     After reasonable inquiry and to the best of his knowledge and belief, the
undersigned certifies that the information set forth in this statement is true,
complete and correct.


                              LOCKHEED MARTIN CORPORATION


                                   
                              By: /s/ Stephen M. Piper             
                                 ------------------------------
                                 Stephen M. Piper
                                 Assistant General Counsel and
                                    Assistant Secretary


                              Dated:  March 29, 1996




                                  Page 6 of 6

 
     NEITHER THIS 9-1/4% SECURED CONVERTIBLE DEBENTURE (THIS "DEBENTURE") NOR 
THE UNDERLYING SHARES OF STOCK INTO WHICH THIS DEBENTURE MAY BE CONVERTED (THE
"CONVERSION SHARES") HAVE BEEN REGISTERED PURSUANT TO THE SECURITIES ACT OF
1933, AS AMENDED, OR ANY STATE SECURITIES LAW.  NEITHER THIS DEBENTURE NOR THE
CONVERSION SHARES NOR ANY PORTION THEREOF OR INTEREST THEREIN MAY BE SOLD,
TRANSFERRED OR OTHERWISE DISPOSED OF UNLESS THE SAME IS REGISTERED AND QUALIFIED
IN ACCORDANCE WITH SAID ACT AND ANY APPLICABLE STATE SECURITIES LAW OR PURSUANT
TO A VALID EXEMPTION FROM SUCH REGISTRATION REQUIREMENTS.  THE HOLDER'S RIGHTS
UNDER THIS DEBENTURE ARE SUBJECT TO THE TERMS OF A SUBORDINATION AGREEMENT AMONG
THE HOLDER, THE ISSUER, AND SILICON VALLEY BANK DATED ON OR ABOUT THE DATE OF
THIS DEBENTURE.

                      9-1/4% SECURED CONVERTIBLE DEBENTURE

     Summagraphics Corporation, a Delaware corporation (the "Issuer"), for value
received and without deduction for defense, offset or counterclaim, hereby
promises to pay to Lockheed Martin Corporation, a Maryland corporation (the
"Holder"), its successors and assigns, Two Million Five Hundred Thousand Dollars
($2,500,000) or such lesser principal amount as is actually advanced by the
Holder from time to time pursuant to the provisions of Section 1 below (the
"Principal Amount") at the times required by Section 3 below, and to pay
interest on said Principal Amount at the rate per annum set forth in Section 2
                                              --- -----                       
below at the times required by Section 3 below, until payment of the Principal
Amount has been fully made or duly provided for.

     Capitalized terms used but not defined herein shall have the meaning
ascribed to them in the Plan of Reorganization and Agreement for the Exchange of
Stock of CalComp Inc. for Stock of Summagraphics Corporation of even date
herewith by and among the Holder, the Issuer and CalComp Inc. (the "Plan of
Reorganization").

     1.  Funding.  From time to time following the date hereof, the Issuer may
         -------                                                              
request advances (each, an "Advance") of some or all of the Principal Amount by
delivering a written request, substantially in the from attached hereto as
Exhibit C, (i) setting forth the amount requested and (ii) describing in
reasonable detail the specific uses of the proceeds of such Advance or stating
the Pre-Approved Use (as defined below) to which the proceeds of such Advance
will be applied.  In no event shall Issuer be entitled to request any Advance in
an amount less than $100,000 nor shall Issuer be entitled to request more than
one Advance in any seven 

 
day period. Subject to approval by Holder (except in the case of Pre-Approved
Uses), an Advance of the Principal Amount will be made by the Holder by wire
transfer of funds into the Issuer's account one business day following the
approval of the written request of the Issuer identifying the specific use(s).
Approval or disapproval of a requested Advance will be provided by Holder within
two business days of the date such request is received by Holder. Schedule 1
attached hereto sets forth a list and description of uses which have been
approved by Holder (the "Pre-Approved Uses"), for which Holder will transfer
funds one business day following receipt of a request from Issuer. Advances of
the Principal Amount which are repaid by the Issuer pursuant to the redemption
provisions contained in Section 5 of this Debenture will not be available to be
readvanced to the Issuer.

     2.  Interest.  Commencing as of the date hereof and continuing until
         --------                                                        
repayment in full of all sums due hereunder, the unpaid Principal Amount shall
bear interest at a rate of 9-1/4% per annum.  All interest payable under the
terms of this Debenture shall be calculated on the basis of a 360 day year and
the actual number of days elapsed.

     3.  Payments and Maturity.  (a) Subject to the provisions of Section 3(b)
         ---------------------                                                
below, the unpaid Principal Amount, together with interest accrued and unpaid
thereon at the rate provided above, shall be due and payable in full at the
earlier of (i) the Closing, (ii) the termination of the Plan of Reorganization
by the Issuer (other than a termination by the Issuer based on a material breach
by Holder pursuant to Section 10.2(b) of the Plan of Reorganization), (iii) the
termination of the Plan of Reorganization by the Holder pursuant to the terms of
Section 10.2(b) thereof, or (iv) June 15, 1996 (or such later date as the Holder
agrees to in writing in Holder's sole and absolute discretion).

     (b) Notwithstanding Section 3(a) above, in the event that either (i) the
Issuer terminates the Plan of Reorganization in accordance with the terms of
Section 10.2(b) thereof or (ii) the Holder terminates the Plan of Reorganization
in breach  thereof, the unpaid Principal Amount, together with interest accrued
and unpaid thereon at the rate provided above, shall be due and payable in full
on the first anniversary of the date of the termination of the Plan of
Reorganization.

                                     - 2 -

 
     4.  Application and Place of Payments.  All payments received on account of
         ---------------------------------                                      
this Debenture shall be applied by the Holder first to the payment of expenses
incurred by the Holder in connection with the collection of amounts payable
under this Debenture (as provided in Section 18), second to the payment of
accrued and unpaid interest then due hereunder and third to the unpaid Principal
Amount. All payments on account of this Debenture shall be paid in lawful money
of the United States of America in immediately available funds during regular
business hours of the Holder at its principal office in Bethesda, Maryland, or
at such other times and places as the Holder may at any time and from time to
time designate in writing to the Issuer.

     5.  Redemption.  The Issuer may redeem this Debenture, in whole but not in
         ----------                                                            
part, at any time, upon ten (10) days' prior written notice to the Holder,
without premium or penalty.  Such notice shall specify the date on which this
Debenture will be redeemed and on the second business day preceding such date
all rights that the Holder may have for the conversion hereof shall
cease if not exercised in the manner provided below, provided, however, such
                                                     --------  -------      
conversion rights shall be reinstated and continue if this Debenture is
surrendered for redemption on the date for redemption specified in the notice
and the Issuer fails to pay the redemption price.  The redemption price shall be
the Principal Amount plus accrued and unpaid interest through and including the
date of redemption.

     6.  Security.  Simultaneously with the execution and delivery of this
         --------                                                         
Debenture, the Issuer shall execute and deliver to the Holder the Security
Agreement in the form attached hereto as Exhibit A securing the obligations of
the Issuer under this Debenture by the Collateral (as defined in the Security
Agreement).

     7.  Events of Default.  The occurrence of any one or more of the following
         -----------------                                                     
events shall constitute an event of default (individually, an "Event of Default"
and collectively, the "Events of Default") under the terms of the Debenture:

     (a) The failure of the Issuer to pay to the Holder when due any and all
principal, interest and expenses, if any, payable by the Issuer to the Holder
under the terms of the Debenture; or

     (b) The failure of the Issuer reasonably to comply with any covenant or
agreement or the breach by the Issuer of any 

                                     - 3 -

 
representation or warranty of the Issuer contained in this Debenture, the
Security Agreement or the Plan of Reorganization, which failure to comply or
breach has not been cured to the complete satisfaction of the Holder within five
(5) business days of such failure or breach; or

     (c) The failure of the Issuer or any of its subsidiaries to pay any Debt
when due, with such failure continuing without cure to the complete satisfaction
of the Holder for more than any applicable grace period with respect thereto, or
to observe or perform any other term or covenant contained in any agreement or
instrument by which the Issuer or any of its subsidiaries is bound evidencing,
securing or relating to Debt, which failure is an event of default as defined in
such agreement or instrument entered into by the Issuer or any of its
subsidiaries as borrower, or which could cause the acceleration of any Debt by a
creditor of the Issuer or any of its subsidiaries; provided that no Event of
Default shall be deemed to have occurred under this subsection 7(c) (i) if the
amount of Debt in default is less than $50,000, unless such breach or default
would otherwise result in a Material Adverse Effect or (ii) if the failure to
pay occurs as a result of a failure by the Issuer to comply with certain
financial covenants imposed by Silicon Valley Bank ("SVB") with respect to which
SVB agrees to forebear in the characterization of such noncompliance as a
default contingent upon the occurrence of closing under the Plan of
Reorganization, as modified or amended by the parties thereto, or (iii) if the
failure to pay occurs as a result of a default under any Debt which occurs due
to any termination of the Plan of Reorganization by the Holder in breach of the
terms thereof; or

     (d) The commencement by the Issuer or any of its subsidiaries of a
voluntary case or other proceeding seeking liquidation, reorganization or other
relief with respect to itself or its debts under any bankruptcy, insolvency or
other similar law now or hereafter in effect or seeking the appointment of a
trustee, receiver, liquidator, custodian or other similar official of it or any
substantial part of its property, or consent to any such relief or to the
appointment of or taking possession by any such official in an involuntary case
or other proceeding commenced against it, or the making by the Issuer or any of
its subsidiaries of a general assignment for the benefit of creditors, or
failing generally to pay its debts as they become due, or taking any corporate
action to authorize any of the foregoing; or

                                     - 4 -

 
     (e) The commencement of an involuntary case or other proceeding against the
Issuer or any of its subsidiaries seeking liquidation, reorganization or other
relief with respect to it or its debts under any bankruptcy, insolvency or other
similar law now or hereafter in effect or seeking the appointment of a trustee,
receiver, liquidator, custodian or other similar official of it or any
substantial part of its property, and such involuntary case or other proceeding
shall remain undismissed and unstayed for a period of 60 days; or an order for
relief shall be entered against the Issuer or any of its subsidiaries under
applicable bankruptcy laws as now or hereafter in effect.

For purposes hereof, "Debt" means at any date, without duplication, (i) all
obligations of the Issuer or any of its subsidiaries for borrowed money, (ii)
all obligations of the Issuer or any of its subsidiaries evidenced by bonds,
debentures, notes or other similar instruments, (iii) all obligations of the
Issuer or any of its subsidiaries to pay the deferred purchase price of property
or services, except trade accounts payable arising in the ordinary course of
business, (iv) all obligations of the Issuer or any of its subsidiaries as
lessee under capital leases, (v) all Debt of others secured by a lien on any
property of the Issuer or any of its subsidiaries, and (vi) all Debt of others
which is guaranteed by the Issuer or any of its subsidiaries or in respect of
which the Issuer or any of its subsidiaries has provided any direct or indirect
assurance against financial loss.

     8.  Conversion Rights.  (a) Upon the occurrence of an Event of Default, and
         -----------------                                                      
from time to time thereafter prior to the date on which the Principal Amount
hereof and all accrued interest thereon is paid in full (provided that if notice
of redemption is delivered in accordance with the provisions of Section 5 above,
the right to convert shall terminate on the second business day next preceding
the date fixed for redemption, unless the Issuer shall default in payment due
upon redemption thereof), the Principal Amount and all accrued and unpaid
interest thereon (or any portion thereof which is an integral multiple of
$1,000) (the "Conversion Amount") shall be convertible at the option of the
Holder into fully paid and non-assessable Common Stock of the Issuer at the
Conversion Rate (as defined below), subject in each case to the adjustments in
the Conversion Rate pursuant to Sections 8(b) and 11(j) below. The shares of
Common Stock into which this Debenture is convertible are hereinafter referred
to as "Conversion Shares."

                                     - 5 -

 
     For purposes of this Debenture the term "Conversion Rate" shall mean 500
shares of Common Stock for each $1,000 of Conversion Amount, provided that, if
the Plan of Reorganization does not close as a result of a termination by the
Issuer pursuant to Section 10.2(b) of the Plan of Reorganization based upon a
material breach of the Plan of Reorganization by the Holder, the Conversion Rate
will be decreased to 333-1/3 shares of Common Stock for each $1,000 of
Conversion Amount.

     (b) Adjustments.  The Conversion Rate from time to time in effect shall be
         -----------                                                           
subject to adjustment as follows:

          (i) In case the Issuer shall (A) pay a dividend in shares of its
Common Stock, (B) subdivide its outstanding shares of Common Stock, (C) combine
its outstanding shares of Common Stock into a smaller number of shares, or (D)
issue by reclassification of its shares of Common Stock any shares of the
Issuer, the Conversion Rate in effect immediately prior thereto shall be
adjusted retroactively as provided below so that the holder of this Debenture
thereafter surrendered for conversion shall be entitled to receive a number of
shares of the Issuer to which he would have been entitled after the happening of
any of the events described above had such Debenture been converted immediately
prior to the happening of such event.  An adjustment made pursuant to this
subsection (i) shall become effective retroactively immediately after the record
date in the case of a dividend and shall become effective immediately after the
effective date in the case of a subdivision, combination or reclassification.

          (ii) In case the Issuer shall issue options, warrants or other rights
to all holders of its Common Stock entitling them to subscribe for or purchase
shares of Common Stock at a price per share less than the fair market value per
share of Common Stock (as defined in subsection (e) below), the number of shares
of Common Stock into which each $1,000 of Principal Amount of and accrued
interest on this Debenture shall thereafter be convertible shall be determined
by multiplying the number of shares of Common Stock into which the aggregate
Conversion Amount was theretofore convertible by a fraction, the numerator of
which shall be the number of shares of Common Stock outstanding on the date of
issuance of such rights

                                     - 6 -

 
or warrants plus the number of additional shares of Common Stock offered for
subscription or purchase, and the denominator of which shall be the number of
shares of Common Stock outstanding on the date of issuance of such rights or
warrants plus the number of shares which the aggregate offering price of the
total number of shares so offered would purchase at such fair market value.
Subject to subsection (5), such adjustment shall be made whenever such rights or
warrants are issued and shall become effective retroactively immediately after
the record date for the determination of Stockholders entitled to receive such
rights or warrants.

          (iii) In case the Issuer shall distribute to all holders of its 
Common Stock evidences of its indebtedness or assets (excluding cash dividends
or distributions) or rights to subscribe or warrants, options or other rights to
purchase (excluding those referred to in subsection (ii) above), then in each
such case the number of shares of Common Stock into which each $1,000 of
Principal Amount of and accrued interest on this Debenture shall thereafter be
convertible shall be determined by multiplying the number of shares of Common
Stock into which the aggregate Conversion Amount was theretofore convertible by
a fraction, the numerator of which shall be the fair market value (as defined in
subsection (e) below) per share of Common Stock on the date of such
distribution, and the denominator of which shall be such fair market value per
share of the Common Stock, less the then fair market value (as determined by
independent public accountants selected by the Holder, whose determination shall
be conclusive) of the portion of the assets or evidences of indebtedness so
distributed or of such subscription rights or warrants applicable to one share
of the Common Stock. Such adjustment shall be made whenever any such
distribution is made and shall become effective retroactively immediately after
the record date for the determination of Stockholders entitled to receive such
distribution.

          (iv) In the event that at any time, as a result of an adjustment to
the Conversion Rate pursuant to subsection 8(b)(i), the Holder shall become
entitled to receive any shares of the Issuer other than shares of its Common
Stock, thereafter the number of such other shares so receivable upon conversion
of this Debenture shall be subject to adjustment from time to time in a manner
and on terms as nearly equivalent as practicable to the provisions contained in
this Section 8 with respect to the Common Stock shall apply on like terms to any
such other shares.

                                     - 7 -

 
          (c) No fractional shares or scrip representing fractional shares shall
be issued upon the conversion of this Debenture.  If the conversion of this
Debenture results in a fraction, an amount equal to such fraction multiplied by
the fair market value (determined as provided by Section 8(e)) of the Common
Stock on the day of conversion shall be paid to such holder in cash by the
Issuer.

          (d) The Issuer covenants that, upon conversion of this Debenture as
herein provided, there will be credited to the Issuer's capital account, from
the consideration for which the shares of Common Stock issuable upon such
conversion are issued, an amount per share of Common Stock so issued as
determined by the Issuer's Board of Directors, which amount shall not be less
than the amount required by law and by the Certificate of Incorporation of the
Issuer, as amended, as in effect on the date of such conversion. For the
purposes of this covenant the Conversion Amount, less the amount of cash paid in
lieu of the issuance of fractional shares on such conversion, shall be deemed to
be the amount of consideration for which the shares of Common Stock issuable
upon such conversion are issued.

          (e) No adjustment in the Conversion Shares shall be made by reason of
the issuance of shares of Common Stock or any security convertible into shares
of Common Stock in exchange for cash, property or services; provided, the value
of such cash, property or services is equal to the fair market value of the
Common Stock issued therefor.  For purposes hereof, the term "fair market value"
of the Common Stock shall mean, for any day, the last sale price per share for
the Common Stock on the National Association of Securities Dealers National
Market System, or, if the Common Stock shall not be listed on such system, the
closing bid price per share in the over-the-counter market, in each such case,
unless otherwise provided herein, averaged over a period of 5 consecutive
trading days prior to the date as of which the determination is to be made.

          (f) The right to convert this Debenture into Common Stock shall be
exercised by the Holder delivering written notice (the "Conversion Notice") and
a copy of the Debenture (provided that if the Conversion Notice relates to the
exercise of conversion rights in respect of all of the Principal Amount and
accrued and unpaid interest, the Holder shall deliver the original Debenture) to
the Issuer at its office in Austin, Texas.  Such conversion shall be deemed to
have been made as of the date such Conversion

                                     - 8 -

 
Notice is sent to the Issuer in accordance with this Debenture. The Holder shall
be treated for all purposes as having become the record holder of such Common
Stock on such date. In case of notice being given by the Issuer for redemption
pursuant to Section 5 above, the right to convert Principal Amount of and
accrued and unpaid interest on the Debenture shall remain in effect until the
close of business on the second business day preceding the date specified in the
notice for redemption and, on that date, shall cease and terminate, unless
previously exercised or the Issuer defaults in the payment of the redemption
price for this Debenture. Upon conversion, the Issuer shall deliver to the
Holder duly issued certificates representing the shares of fully paid and
nonassessable Common Stock which constitute the Conversion Shares as well a new
debenture on the same terms hereof representing the remaining Principal Amount
which shall include all accrued and unpaid interest up to the date of
Conversion.

          (g) The Issuer shall pay all expenses, taxes (other than income taxes
of Holder) and other charges payable in connection with the preparation,
execution and delivery of stock certificates and the new debenture pursuant to
this Section 8, except that, in case such stock certificates or new debenture
shall be registered in a name or names other than the name of the Holder of this
Debenture, funds sufficient to pay all stock transfer taxes, if any, which shall
be payable upon the execution and delivery of such stock certificates or
debenture shall be paid by the Holder to the Issuer at the time of delivering 
the Debenture to the Issuer upon exercise.

     9.  Transfer of Debenture and Conversion Shares.  (a) The Holder of this
         -------------------------------------------                         
Debenture, by acceptance hereof, represents and acknowledges that this Debenture
and the Conversion Shares which may be purchased upon exercise of the conversion
rights contained in Section 8 hereof are not being registered under the
Securities Act of 1933, as amended (the "Securities Act").  The Holder is
acquiring this Debenture for investment for its own account, with no intention
of reselling or otherwise distributing the same without registration under the
Securities Act, except pursuant to a valid exemption under the Securities Act.
Neither this Debenture nor the Conversion Shares issuable hereunder may be
transferred except (i) pursuant to an effective registration statement under the
Securities Act, (ii) to any affiliate of Holder, or a nominee thereof, or (iii)
pursuant to a valid exemption from registration under the Securities Act.

                                     - 9 -

 
     10.  Capitalization of the Issuer.  The Issuer represents and warrants to
          ----------------------------                                        
the Holder that the authorized capital stock of the Issuer is 20,000,000 shares
of common stock, $.01 par value, (the "Common Stock") of which 4,623,735 shares
are issued and outstanding on the date hereof.  All such shares of the Common
Stock have been duly authorized and validly issued and are fully paid and
nonassessable.

     11.  Additional Agreements of the Issuer.  The Issuer agrees with the
          -----------------------------------                             
Holder and with any holder of Conversion Shares acquired upon conversion of all
or a portion of the Principal Amount and accrued and unpaid interest that:

          (a) Character of Conversion Shares.  All shares which may be issued
              ------------------------------                                 
upon the exercise of the rights contained in the Debenture, have been duly
authorized by the Issuer's Board of Directors and upon issuance, will be validly
issued, fully paid and nonassessable and free from all taxes (other than income
taxes of Holder), liens and charges with respect to the issue thereof;

          (b) Reservation of Shares.  During the period within which the
              ---------------------                                     
conversion rights contained in this Debenture may be exercised, the Issuer will
have at all times authorized and reserved (free from preemptive rights) for the
purpose of issue or transfer upon exercise of the conversion rights contained in
Section 8 hereof, a sufficient number of shares of its Common Stock to provide
for the exercise of the conversion rights and all other agreements pursuant to
which third parties have rights to acquire shares of Common Stock;

          (c) No Violations.  The Issuer will take all such action as may be
              -------------                                                 
necessary to ensure that Conversion Shares may be so issued without violation of
any applicable law or regulation, or of any requirements of the National
Association of Securities Dealers National Market System;

          (d) Maintain Authorized Shares.  The Issuer will not take any action
              --------------------------                                      
that would result in any adjustment of the number of Conversion Shares issuable
upon exercise of the conversion rights if the total number of Conversion Shares
purchasable after such action upon conversion of the full Conversion Amount,
together with all shares of Common Stock then outstanding and all shares of
Common Stock then issuable upon exercise of all options and other warrants to
purchase Common Stock and upon conversion of all

                                     - 10 -

 
convertible securities then outstanding, would exceed the total number of shares
of Common Stock then authorized by the Issuer's Certificate of Incorporation, as
then amended;

          (e) Actions in Avoidance; Non-Dilution.  The Issuer will not, by
              ----------------------------------                          
amendment of its Certificate of Incorporation or through any reorganization,
transfer of assets, consolidation, merger, issue or sale of securities or
otherwise, avoid or take any action which would have the effect of avoiding the
observance or performance of any of the terms to be observed or performed
hereunder by the Issuer, but will at all times in good faith assist in carrying
out all of the provisions of this Debenture and in taking all of such action as
may be necessary or appropriate in order to protect the rights of the Holder of
this Debenture and holders of any Conversion Shares issued pursuant hereto; and

          (f) Financial Information.  The Issuer will provide the Holder copies
              ---------------------                                            
of all annual, quarterly and monthly financial statements, promptly after the
same are available, and in addition, promptly after requested, such other
information concerning the Issuer as the Holder may reasonably require (i) in
order to comply with any law or governmental regulation, order of any court, or
order, inquiry or investigation of any governmental agency or instrumentality,
or (ii) in order to exercise any right or privilege of the Holder or to enforce
any obligation of the Issuer under the Debenture or any agreement or instrument
executed and delivered in connection therewith.  All information provided
pursuant to this Section 11(f) (other than any information otherwise generally
available to the public) will be treated as confidential and the Holder will
cause its advisors and agents to maintain the confidentiality of all such
confidential information.

          (g) Notice of Adjustment.  Whenever the Conversion Shares issuable
              --------------------                                          
upon the exercise of the conversion rights hereunder shall be adjusted as herein
provided, or the rights of the Holder or holders of Conversion Shares shall
change by reason of other events specified herein, the Issuer shall compute the
adjusted number of Conversion Shares in accordance with the provisions hereof
and shall prepare a certificate signed by its chief executive officer or
principal financial officer setting forth the adjusted number of Conversion
Shares issuable upon the exercise of the conversion rights or specifying the
other shares of stock, securities or assets receivable as a result of such
change in rights, and showing in reasonable detail the facts and

                                     - 11 -

 
calculations upon which such adjustments or other changes are based, and shall
obtain an opinion of the Issuer's independent certified public accountants
reasonably satisfactory to the Holder as to the correctness of such adjustments
and calculations and to the effect that such adjustments and calculations have
been made in accordance with the terms hereof. The Issuer shall cause to be
mailed to the Holder copies of such officer's certificate and accountants'
opinion together with a notice stating that the number of Conversion Shares
purchasable upon exercise of the conversion rights have been adjusted and
setting forth the adjusted number of Conversion Shares so purchasable.

          (h) Dividend Restrictions.  Without the prior written consent of the
              ---------------------                                           
Holder, the Issuer will not declare or pay any dividend or other distribution
(whether cash or property) on its Common Stock.

          (i) Notifications to Holder.  The Issuer shall give written notice at
              -----------------------                                          
least 30 days prior to:

          (i)   offering for subscription pro rata to the holders of its Common
Stock any additional shares of stock of any class or other rights;

          (ii)  effecting any capital reorganization, or reclassification of the
capital stock of the Issuer, or consolidation, merger or share exchange of the
Issuer with another corporation, or sale, transfer or other disposition of all
or substantially all of its assets; or

          (iii) effecting a voluntary dissolution, liquidation or
winding up of the Issuer;

and, in any one or more of such cases, the Issuer shall give the Holder (A) at
least 30 days' (but not more than 120 days') prior written notice of the date on
which the books of the Issuer shall close or a record shall be taken for such
subscription rights or for determining rights to vote in respect of any such
issuance, reorganization, reclassification, consolidation, merger, share
exchange, sale, transfer, disposition, dissolution, liquidation or winding up,
and (B) in the case of any such issuance, reorganization, reclassification,
consolidation, merger, share exchange, sale, transfer, disposition, dissolution,
liquidation or

                                     - 12 -

 
winding up, at least 30 days' (but not more than 120 days') prior
written notice of the date when the same shall take place.

          (j) Issuer to Prevent Dilution.  If any event or condition occurs as
              --------------------------                                      
to which other provisions of this Section 11 are not strictly applicable or if
strictly applicable would not fairly protect the conversion rights under this
Debenture in accordance with the essential intent and principles of such
provisions, or which might materially and adversely affect the conversion rights
of the Holder under any provisions of this Debenture, then the Issuer shall make
an adjustment in the application of such provisions, in accordance with such
essential intent and principles, so as to protect such conversion  rights as
aforesaid, and any adjustment necessary with respect to the Conversion Amount
and the number of Conversion Shares purchasable hereunder so as to preserve the
rights of the Holder of this Debenture hereunder.

     12.  Consent of Lenders.  The Issuer represents and warrants to the Holder
          ------------------                                                   
that, prior to the date hereof, the Issuer has received and delivered to the
Holder (in form reasonably satisfactory to the Holder) a written consent and
waiver to Issuer's execution and delivery of this Debenture and the Security
Agreement from Silicon Valley Bank.

     13.  Registration Rights Agreement.  Simultaneously with the execution and
          -----------------------------                                        
delivery of this Debenture, the Holder and Issuer shall execute and deliver the
registration rights agreement in the form attached hereto as Exhibit B.

     14.  Exchange and Replacement.  This Debenture is exchangeable, upon the
          ------------------------                                           
surrender hereof by the Holder at the office of the Issuer described herein, for
one or more new Debentures of like tenor and date representing in the aggregate
the right to payment of any then outstanding indebtedness issued pursuant to the
Debenture and to purchase the number of Conversion Shares which may be purchased
hereunder.

     15.  Remedies.  Upon the occurrence of an Event of Default, at the option
          --------                                                            
of the Holder, all amounts payable by the Issuer to the Holder under the terms
of this Debenture shall become immediately due and payable by the Issuer to the
Holder without notice to the Issuer or any other person, and the Holder shall
have all of the rights, powers, and remedies available under the terms of this

                                     - 13 -

 
Debenture or at law or in equity or otherwise.  The Issuer and all endorsers,
guarantors, and other parties who may now or in the future be primarily or
secondarily liable for the payment of the indebtedness evidenced by this
Debenture hereby severally waive presentment, protest and demand, notice of
protest, notice of demand and of dishonor and non-payment of this Debenture and
expressly agree that this Debenture or any payment hereunder may be extended
from time to time without in any way affecting the liability of the Issuer,
guarantors and endorsers.

     16.  Confessed Judgment.  UPON THE OCCURRENCE OF AN EVENT OF DEFAULT, THE
          ------------------                                                  
ISSUER HEREBY AUTHORIZES ANY ATTORNEY DESIGNATED BY THE HOLDER OR ANY CLERK OF
ANY COURT OF RECORD TO APPEAR FOR THE ISSUER IN ANY COURT OF RECORD AND TO
CONFESS JUDGMENT WITHOUT PRIOR HEARING AGAINST THE ISSUER IN FAVOR OF THE HOLDER
FOR AND IN THE AMOUNT OF THE UNPAID PRINCIPAL AMOUNT, ALL INTEREST ACCRUED AND
UNPAID THEREON, ALL OTHER AMOUNTS PAYABLE BY THE ISSUER TO THE HOLDER UNDER THE
TERMS OF THIS DEBENTURE OR ANY OTHER LOAN DOCUMENTS, COSTS OF SUIT, AND
ATTORNEYS' FEES.  THE ISSUER HEREBY RELEASES, TO THE EXTENT PERMITTED BY
APPLICABLE LAW, ALL ERRORS AND ALL RIGHTS TO EXEMPTION, APPEAL, STAY OF
EXECUTION, INQUISITION, AND OTHER RIGHTS TO WHICH THE ISSUER MAY OTHERWISE BE
ENTITLED UNDER THE LAWS OF THE UNITED STATES OF AMERICA OR OF ANY STATE OR
POSSESSION OF THE UNITED STATES OF AMERICA NOW IN FORCE OR WHICH MAY HEREAFTER
BE ENACTED.  THE AUTHORITY AND POWER TO APPEAR FOR AND ENTER JUDGMENT AGAINST
THE ISSUER SHALL NOT BE EXHAUSTED BY ONE OR MORE EXERCISES THEREOF OR BY ANY
IMPERFECT EXERCISE THEREOF AND SHALL NOT BE EXTINGUISHED BY ANY JUDGMENT ENTERED
PURSUANT THERETO.  SUCH AUTHORITY MAY BE EXERCISED ON ONE OR MORE OCCASIONS OR
FROM TIME TO TIME IN THE SAME OR DIFFERENT JURISDICTIONS AS OFTEN AS THE HOLDER
SHALL DEEM NECESSARY OR DESIRABLE, FOR ALL OF WHICH THIS DEBENTURE SHALL BE A
SUFFICIENT WARRANT.

     17.  Consent to Jurisdiction.  THE ISSUER IRREVOCABLY SUBMITS TO THE
          -----------------------                                        
JURISDICTION OF ANY STATE OR FEDERAL COURT SITTING IN THE STATE OF MARYLAND OVER
ANY SUIT, ACTION, OR PROCEEDING ARISING OUT OF OR RELATING TO THIS DEBENTURE.
THE ISSUER IRREVOCABLY WAIVES, TO THE FULLEST EXTENT PERMITTED BY LAW, ANY
OBJECTION THAT THE ISSUER MAY NOW OR HEREAFTER HAVE TO THE LAYING THE VENUE OF
ANY SUCH SUIT, ACTION, OR PROCEEDING BROUGHT IN ANY SUCH COURT AND ANY CLAIM
THAT ANY SUCH SUIT, ACTION, OR PROCEEDING BROUGHT IN ANY SUCH COURT HAS BEEN
BROUGHT IN AN INCONVENIENT FORUM.  FINAL JUDGMENT IN ANY SUCH SUIT, ACTION, OR
PROCEEDING BROUGHT IN ANY SUCH COURT SHALL BE CONCLUSIVE AND BINDING UPON THE
ISSUER AND MAY BE ENFORCED

                                     - 14 -

 
IN ANY COURT IN WHICH THE ISSUER IS SUBJECT TO JURISDICTION BY A SUIT UPON SUCH
JUDGMENT PROVIDED THAT SERVICE OF PROCESS IS EFFECTED UPON THE ISSUER AS
PROVIDED IN THIS DEBENTURE OR AS OTHERWISE PERMITTED BY APPLICABLE LAW.


     18.  Waiver of Trial by Jury.  The parties hereto hereby waive trial by
          -----------------------                                           
jury in any action or proceeding to which any or all of them may be parties,
arising out of or in any way pertaining to this Debenture.  It is agreed and
understood that this waiver constitutes a waiver of trial by jury of all claims
against all parties to such actions or proceedings, including claims against
parties who are not parties to this Debenture.

          This waiver is knowingly, willingly and voluntarily made by each of
the parties hereto, and the parties hereby represent that no representations of
fact or opinion have been made by any individual to induce this waiver of trial
by jury or to in any way modify or nullify its effect.  The parties further
represent that they have been represented in the signing of this Debenture and
in the making of this waiver by independent legal counsel, selected of their own
free will, and that they have had the opportunity to discuss this waiver with
counsel.

     19.  Expenses.  The Issuer promises to pay to the Holder on demand by the
          --------                                                            
Holder all reasonable costs and expenses incurred by the Holder in connection
with the collection and enforcement of this Debenture following the occurrence
of an Event of Default, including, without limitation, all attorneys' fees and
expenses and all court costs.

     20.  Incorporation by Reference.  Each of the representations and
          --------------------------                                  
warranties of Borrower set forth in the Plan of Reorganization are hereby 
incorporated by reference and may be relied on by Lender as if set forth in 
full herein.

     21.  Notices.  Any notice, request, or demand to or upon the Issuer or the
          -------                                                              
Holder shall be deemed to have been properly given or made when delivered by
certified mail, return-receipt requested, or by facsimile, receipt confirmed:

                                     - 15 -

 
          If to Holder:    Lockheed Martin Corporation
                           6801 Rockledge Drive
                           Bethesda, Maryland  20817
                           Attention:  Treasurer
                           Telecopy:  301-897-6651

          With a required
          copy to:         Lockheed Martin Corporation
                           6801 Rockledge Drive
                           Bethesda, Maryland  20817
                           Attention:  Pete Reynolds
                                       Assistant Treasurer-
                                       Treasury Operations
                            Telecopy:  301-897-6406

          If to Issuer:    Summagraphics Corporation
                           8500 Cameron Road
                           Austin, Texas  78746
                           Attention:  President
                           Telecopy:  512-327-9844

     22.  Partial Invalidity.  In the event any provision of this Debenture (or
          ------------------                                                   
any part of any provision) is held by a court of competent jurisdiction to be
invalid, illegal, or unenforceable in any respect, such invalidity, illegality,
or unenforceability shall not affect any other provision (or remaining part of
the affected provision) of the Debenture; but the Debenture shall be construed
as if such invalid, illegal, or unenforceable provision (or part thereof) had
not been contained in this Debenture, but only to the extent it is invalid,
illegal, or unenforceable.

     23.  Captions.  The captions herein set forth are for convenience only and
          --------                                                             
shall not be deemed to define, limit, or describe the scope or intent of this
Debenture.

                                     - 16 -

 
     24.  Governing Law.  The provisions of this Debenture shall be construed,
          -------------                                                       
interpreted and enforced in accordance with the laws of the State of Maryland
(excluding conflicts of law principles) as the same may be in effect from time
to time.

     25.  Assignment.  This Debenture may not be assigned, in whole or in part,
          ----------                                                           
by either party without the prior written consent of the other party; provided,
                                                                      -------- 
however, that Holder may assign this Debenture to any of its subsidiaries.
- -------                                                                   

     IN WITNESS WHEREOF, Holder and Issuer have caused this Debenture to be
signed by their duly authorized officers under its corporate seal, duly attested
by its authorized officer, and to be dated as of March   , 1996.
                                                       --

ATTEST:                               SUMMAGRAPHICS CORPORATION,
                                        a Delaware Corporation


                                By:                           (SEAL)
- ------------------------------     ---------------------------
Robert B. Sims                       Michael S. Bennett
Secretary                            President and Chief Executive
                                       Officer


ATTEST:                               LOCKHEED MARTIN CORPORATION,
                                         a Maryland Corporation


                                By:                           (SEAL)
- ------------------------------     ---------------------------
Secretary                             Walter E. Skowronski
                                      Vice President and Treasurer

                                     - 17 -

 
                             PLAN OF REORGANIZATION

                                      and

                     AGREEMENT FOR THE EXCHANGE OF STOCK OF

              CALCOMP INC. FOR STOCK OF SUMMAGRAPHICS CORPORATION

                                  by and among

                          LOCKHEED MARTIN CORPORATION,
                            a Maryland corporation,

                                 CALCOMP INC.,
                            a California corporation

                                      and

                           SUMMAGRAPHICS CORPORATION,
                             a Delaware corporation



                           dated as of March 19, 1996

 
                               Table of Contents
                               -----------------


                                                            Page
                                                            ----

                                   ARTICLE I

                                  THE EXCHANGE
 
     1.1  The Exchange.......................................  1
     1.2  Closing............................................  2
     1.3  Determination of Summagraphics Exchange Shares.....  2
     1.4  Employee Benefits..................................  3
     1.5  Board of Directors.................................  3
     1.6  Officers...........................................  4
     1.7  Name Change........................................  4
     1.8  Treatment of Stock Options/Severance/Incentive
          Compensation.......................................  4
     1.9  Certain Definitions................................  4
 
                                  ARTICLE II

                       CERTAIN EVENTS PRECEDING CLOSING

     2.1  Proxy Statement....................................  5
     2.2  Interim Financing..................................  6
     2.3  Transfer of AGT Holdings, Inc. Stock...............  6
     2.4  Additional Filings.................................  6
 

                                  ARTICLE III

                         REPRESENTATIONS AND WARRANTIES

     3.1  Representations and Warranties of Summagraphics....  6
          (a)  Organization and Authority....................  6
          (b)  Capital Structure.............................  7
          (c)  Authority.....................................  7
          (d)  Subsidiaries..................................  8
          (e)  Financial Statements..........................  8
          (f)  Absence of Undisclosed Liabilities............  8
          (g)  No Material Adverse Changes...................  9
          (h)  Tax Matters...................................  9


                                      (i)

 
            (i)  Property.................................... 10
            (j)  Litigation.................................. 10
            (k)  Contracts and Commitments................... 10
            (l)  Accuracy of Information Supplied............ 11
            (m)  Summagraphics' Employee Benefit Plans....... 12
            (n)  Environmental Matters....................... 14
            (o)  Employees; Directors and Officers........... 16
            (p)  Compliance with Laws........................ 16
            (q)  Insurance................................... 17
            (r)  Applicable Takeover Laws.................... 17
            (s)  Product and Service Warranty................ 17
            (t)  Summagraphics Common Stock to be Issued..... 18
            (u)  Labor Disputes.............................. 18
            (v)  Technology.................................. 18
            (w)  Opinion of Financial Advisor................ 19
            (x)  Books and Records........................... 19
            (y)  Full Disclosure............................. 19
            (z)  Investment Representation................... 20
            (aa) Banks and Financial Institutions............ 20
            (bb) Backlog..................................... 20
     3.2    Representations and Warranties of CalComp........ 20
            (a)  Organization, Standing and Power............ 20
            (b)  Capital Structure........................... 21
            (c)  Authority................................... 21
            (d)  Subsidiaries................................ 21
            (e)  Financial Statements........................ 22
            (f)  Absence of Undisclosed Liability............ 22
            (g)  No Material Adverse Change.................. 22
            (h)  Litigation.................................. 23
            (i)  Accuracy of Information Supplied............ 23
            (j)  Environmental Matters....................... 23
            (k)  Compliance with Laws........................ 24
            (l)  Technology.................................. 24
     3.3    Representations and Warranties of Lockheed Martin.25
            (a)  Organization and Standing................... 25
            (b)  Authority................................... 25
            (c)  Litigation.................................. 25
            (d)  Ownership of CalComp Exchange Shares........ 26
            (e)  Investment Representation................... 26
            (f)  Tax Matters................................. 26
            (g)  Accuracy of Information Supplied............ 27
 

                                   ARTICLE IV

                                     (ii)

 
                CONDUCT OF BUSINESS PRIOR TO THE CLOSING

     4.1   Conduct of the Business of Summagraphics and its
           Subsidiaries' Prior to the Closing...............  27
     4.2   Forbearance......................................  27
     4.3   No Solicitation..................................  29
     4.4   Termination Fee..................................  30
     4.5   Compliance with Tax-Free Provisions..............  30
     4.6   Access and Information; Cooperation..............  30
     4.7   Confidentiality..................................  31
     4.8   Public Announcements.............................  32
     4.9   Consents.........................................  32
     4.10  Meeting of Summagraphics Stockholders............  32
 
                                 ARTICLE V

                     ADDITIONAL COVENANTS OF SUMMAGRAPHICS

     5.1  Issuance of Stock.................................. 33
     5.2  Intercompany Agreements............................ 33
     5.3  Amendment and Restatement of Articles of
          Incorporation...................................... 33
     5.4  Preparation of Proxy Statement..................... 34
     5.5  Additional Listing Application..................... 34
     5.6  Filing of Form 10-C................................ 34
     5.7  Hart-Scott-Rodino.................................. 34
     5.8  Stock Option Plan.................................. 34
 
                                   ARTICLE VI

                    COVENANTS OF CALCOMP AND LOCKHEED MARTIN

     6.1  Transfer of CalComp Exchange Shares................ 34
     6.2  Intercompany Agreements............................ 34
     6.3  Preparation of Proxy Statement..................... 34
     6.4  Hart-Scott-Rodino.................................. 34
     6.5  CalComp Financial Statements....................... 35
     6.6  Pre-Closing Assistance............................. 35
 
                                  ARTICLE VII

                                     (iii)

 
                       CONDITIONS PRECEDENT TO CALCOMP'S
                  AND LOCKHEED MARTIN'S OBLIGATIONS HEREUNDER

     7.1  Representations, Warranties, Covenants............. 35
     7.2  No Adverse Changes................................. 36
     7.3  Due Diligence Audit of Summagraphics and its
          Subsidiaries....................................... 36
     7.4  Legal Opinion...................................... 36
     7.5  No Adverse Proceedings............................. 36
     7.6  Intercompany Agreements............................ 36
     7.7  Approval by Stockholders of the Agreement, the
          Stock Option Plan and Amendment and Restatement of
          Summagraphics' Articles of Incorporation........... 36
     7.8  Additional Listing Application..................... 37
     7.9  Secretary's Certificate............................ 37
     7.10 Compliance With Laws/Government Approvals.......... 37
     7.11 Backlog............................................ 37
 
                                  ARTICLE VIII

          CONDITIONS PRECEDENT TO SUMMAGRAPHICS' OBLIGATIONS HEREUNDER

     8.1  Representations, Warranties, Covenants............. 37
     8.2  No Adverse Proceedings or Events................... 38
     8.3  No Adverse Changes................................. 38
     8.4  Legal Opinion...................................... 38
     8.5  Fairness Opinion................................... 38
     8.6  Stockholder Approval............................... 38
     8.7  Secretary's Certificate............................ 38
     8.8  Intercompany Agreements............................ 38
 
                                   ARTICLE IX

                             ADDITIONAL AGREEMENTS

     9.1  Update Disclosure; Breaches........................ 38
     9.2  Tax Returns........................................ 39
     9.3  Best Efforts and Further Assurances................ 39
     9.4  Payoff of Outstanding Indebtedness................. 39
     9.5  Directors and Officers Liability Insurance......... 39
     9.6  CalComp Taxes...................................... 40


                                     (iv)

 
                                   ARTICLE X

                      TERMINATION, AMENDMENT, SURVIVAL OF
                       REPRESENTATIONS AND MISCELLANEOUS

     10.1 Amendment.......................................... 40
     10.2 Termination........................................ 40
     10.3 Survival of Representations and Covenants.......... 42
     10.4 Expenses........................................... 42
     10.5 Notices............................................ 42
     10.6 Entire Agreement in Effect......................... 43
     10.7 General............................................ 43
     10.8 Governing Law...................................... 43
     10.9 Counterparts....................................... 43
 


                                      (v)

 
List of Schedules and Exhibits
- ------------------------------

Schedule 1.3             Determination of Exchange Shares
Schedule 1.8             Treatment of Stock
                           Options/Severance/Incentive Compensation
Schedule 3.1(a)          Organization and Authority
Schedule 3.1(b)(1)       Capital Structure
Schedule 3.1(c)          Summagraphics Corporation - Corporate
                           Authority
Schedule 3.1(d)          Summagraphics Corporation - Subsidiaries
Schedule 3.1(e)          Summagraphics Corporation - Financial
                           Statements
Schedule 3.1(f)          Summagraphics Corporation - Absence of
                           Undisclosed Liabilities
Schedule 3.1(i)(1)(v)    Summagraphics Corporation - Property
                           (Encumbrances)
Schedule 3.1(j)          Summagraphics Corporation - Litigation
Schedule 3.1(k)          Summagraphics Corporation - Contracts and
                           Commitments
Schedule 3.1(m)          Summagraphics Corporation - Employee
                           Benefit Plans
Schedule 3.1(m)(vii)     Summagraphics Corporation - No Violations
                           of Plan
Schedule 3.1(n)(ii)      Summagraphics Corporation - Violations
Schedule 3.1(n)(iii)     Summagraphics Corporation - Environmental
                           Proceedings
Schedule 3.1(n)(v)       Summagraphics Corporation - Environmental
                           Permits
Schedule 3.1(n)(vi)      Summagraphics Corporation - Environmental
                           Spills
Schedule 3.1(n)(vii)     Hazardous Waste Handling
Schedule 3.1(o)          Summagraphics Corporation - Employees;
                           Directors and Officers
Schedule 3.1(p)          Summagraphics Corporation - Compliance
                           With Laws
Schedule 3.1(s)          Summagraphics Corporation - Product and
                           Service Warranty
Schedule 3.1(u)          Summagraphics Corporation - Labor Disputes
Schedule 3.1(v)          Summagraphics Corporation -Technology
Schedule 3.1(w)          Summagraphics Corporation - Opinion of
                           Financial Advisor
Schedule 3.1(aa)         Summagraphics Corporation - Banks and
                           Financial Institutions


                                     (vi)

 
Schedule 3.2(d)          CalComp Inc. - Subsidiaries
Schedule 3.2(e)          CalComp Inc. - Financial Statements
Schedule 3.2(j)          CalComp Inc. - Environmental Matters
Schedule 3.2(k)          CalComp Inc. - Compliance With Laws
Schedule 3.2(l)          CalComp Inc. - Technology
Schedule 4.2             Forbearance




Exhibit A                Secured Convertible Debenture
Exhibit B                Intercompany Services Agreement
Exhibit C                Cash Management Agreement
Exhibit D                Tax Sharing Agreement
Exhibit E                Revolving Credit Agreement
Exhibit F                Registration Rights Agreement
Exhibit G                Corporate Agreement
Exhibit H                Fourth Amended and Restated Articles of
                           Incorporation
Exhibit I                Stock Option Plan




                                     (vii)

 
         PLAN OF REORGANIZATION AND AGREEMENT FOR THE EXCHANGE OF STOCK
             OF CALCOMP INC. FOR STOCK OF SUMMAGRAPHICS CORPORATION

          THIS PLAN OF REORGANIZATION AND AGREEMENT FOR THE EXCHANGE OF STOCK OF
CALCOMP INC. FOR STOCK OF SUMMAGRAPHICS CORPORATION (this "Agreement"), dated
this 19th day of March, 1996, is entered into by and among LOCKHEED MARTIN
CORPORATION, a Maryland corporation ("Lockheed Martin"), CALCOMP INC., a
California corporation ("CalComp") and SUMMAGRAPHICS CORPORATION, a Delaware
corporation ("Summagraphics").  Lockheed Martin, CalComp and Summagraphics
individually are being referred to herein as a "Party" and collectively are
referred to herein as "Parties."

                               W I T N E S E T H:
                               - - - - - - - - - 

          WHEREAS, CalComp has an authorized capital of 1,000 shares of Common
Stock of which 1,000 shares are issued and outstanding as of the date of this
Agreement, all of which are owned by Lockheed Martin;

          WHEREAS, Summagraphics has an authorized capital of 20,000,000 shares
of Common Stock, par value $.01 per share, of which 4,623,735 shares are issued
and outstanding as of the date of this Agreement, and 5,000,000 shares of
Preferred Stock, par value $.01 per share, none of which are outstanding as of
the date of this Agreement;

          WHEREAS, the boards of directors of each of Lockheed Martin, CalComp
and Summagraphics deem it advisable and in the best interests of the Parties and
their stockholders that Lockheed Martin exchange all of the issued and
outstanding capital stock of CalComp for a number of newly issued shares of
Common Stock of Summagraphics (the "Exchange"), as determined in accordance with
the provisions of Section 1.3 below;

          WHEREAS, the Board of Directors of Summagraphics has approved (i) the
transactions contemplated by this Agreement, (ii) the Fourth Amended and
Restated Articles of Incorporation (as defined in Section 5.3) and (iii) the
Stock Option Plan (as defined in Section 5.8) and recommended their submission
to the stockholders of Summagraphics for approval;

          WHEREAS, the Parties desire the Exchange to qualify as a
"reorganization" under the provisions of Section 368(a)(1)(B) of the Internal
Revenue Code of 1986, as amended (the "Code"); and

          WHEREAS, the Parties desire to provide for certain undertakings,
conditions, warranties, representations and covenants in connection with the
transactions contemplated hereby.


 
          NOW, THEREFORE, in consideration of the premises and of the mutual
covenants, agreements, representations and warranties herein contained, the
Parties agree as follows:

                                   ARTICLE I

                                  THE EXCHANGE

          1.1  The Exchange.  Upon performance of all covenants and obligations
               ------------                                                    
of the Parties contained in this Agreement and upon the terms and conditions
contained herein, on the Closing Date (as hereinafter defined) Lockheed Martin
agrees to transfer and deliver, or cause to be transferred and delivered, to
Summagraphics all of the issued and outstanding CalComp Common Stock (the
"CalComp Exchange Shares"), and Summagraphics agrees to issue and deliver to
Lockheed Martin (or a direct or indirect wholly owned subsidiary of Lockheed
Martin) such number of shares of Summagraphics Common Stock as is determined in
accordance with the provisions of Section 1.3 below (the "Summagraphics Exchange
Shares"). As a result of the Exchange, Summagraphics shall own 100% of the
issued and outstanding capital stock of CalComp and Lockheed Martin (or a direct
or indirect wholly owned subsidiary) shall own in the aggregate 89.7% of all of
the issued and outstanding shares of Summagraphics Common Stock outstanding
immediately following the Exchange (on a Fully Diluted Basis).

          1.2  Closing.  The consummation of the transactions contemplated by
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this Agreement (the "Closing") will take place at such time on a date not prior
to May 8, 1996 (the "Closing Date") as shall be mutually agreed to by Lockheed
Martin and Summagraphics but in any case shall be as soon as reasonably
practicable on or after the date of Summagraphics' special meeting of
stockholders called to consider the Exchange.  In no event shall the Closing
Date be later than May 31, 1996, provided that if Securities and Exchange
Commission clearance of the Proxy Statement (as hereinafter defined) occurs
after April 26, 1996, the time for the Closing will be extended by a number of
days equal to the number of days after April 26, 1996 that such clearance is
received, but in no event beyond June 15, 1996.

          1.3  Determination of Summagraphics Exchange Shares.  The number of
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Summagraphics Exchange Shares delivered to Lockheed Martin shall equal a number
of shares of Summagraphics Common Stock determined so that immediately after the
Exchange Lockheed Martin owns 89.7% of all of the issued and outstanding capital
stock of Summagraphics determined on a Fully Diluted Basis.  For purposes of
this Agreement, "Fully Diluted Basis" shall mean a basis whereby

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the aggregate number of shares of Common Stock for such determination includes
(i) all Summagraphics Common Stock then issued and outstanding, (ii) all
Summagraphics Common Stock that would be issued and outstanding upon the
exercise, conversion or exchange of all outstanding warrants, options or other
rights to subscribe for, purchase or otherwise acquire any shares of
Summagraphics Common Stock (or rights to acquire any such warrants, options or
other rights), regardless of whether such warrants, options or other rights are
then exercisable, convertible or exchangeable, (iii) all Summagraphics Common
Stock which would be outstanding upon the exercise, conversion or exchange of
all outstanding evidences of indebtedness, shares of capital stock or other
securities (or rights to acquire any of the foregoing) which are or may be
exercisable, convertible or exchangeable into shares of Common Stock, regardless
of whether such evidences of indebtedness, shares of stock or other securities
are then exercisable, convertible or exchangeable, and (iv) the Summagraphics
Exchange Shares issuable upon such determination but excluding Summagraphics
Common Stock issuable upon conversion of the Secured Convertible Debenture. For
purposes of subsections (ii) and (iii) above, the number of shares of
Summagraphics Common Stock issuable pursuant to options, warrants and rights of
conversion that will be deemed to be outstanding will be determined using the
"Treasury Stock Method" of accounting as defined in APB Opinion 15 based on an
average of the closing prices, as reported in the Wall Street Journal -- NASDAQ
National Market Issues, for the five days preceding Closing. An example of the
calculation provided above is attached as Schedule 1.3.

          1.4  Employee Benefits.  Employees of CalComp and its subsidiaries
               -----------------                                            
(each subsidiary of CalComp is hereinafter referred to as a "CalComp Subsidiary"
or collectively as the "CalComp Subsidiaries") immediately prior to the Exchange
will be eligible to continue to participate in all of the employee benefit
programs of CalComp in which such employees were eligible to participate on the
same terms and conditions as were previously applicable; provided, however, that
they continue to meet the eligibility requirements of those programs.  Employees
of Summagraphics and its subsidiaries (each subsidiary of Summagraphics is
hereinafter referred to as a "Summagraphics Subsidiary" or collectively as the
"Summagraphics Subsidiaries") who are employees of Summagraphics or a
Summagraphics Subsidiary immediately prior to the Exchange and who are not made
eligible to participate in the employee benefit programs of CalComp following
the Exchange will be eligible to continue to participate in all of the employee
benefit plans of Summagraphics in which such employees were eligible to
participate prior to the Exchange on the same terms and conditions as were

                                     - 3 -

 
previously applicable; provided, however, that they continue to meet the
eligibility requirements of those programs.  In the event that the Parties shall
determine to extend eligibility to participate in the employee benefit programs
of CalComp to employees who are employees of Summagraphics immediately prior to
the Exchange, (i) service with Summagraphics and Summagraphics Subsidiaries
shall be considered service with CalComp for purposes of determining eligibility
and vesting under all such CalComp employee benefit programs and (ii) medical
plans of CalComp will offer Summagraphics' employees full coverage for pre-
existing conditions and credit for deductibles and co-insurance payments to date
during the plan year.  Notwithstanding the foregoing, nothing contained in this
Section 1.4 shall be deemed to convey any right or benefit upon any employee of
CalComp or CalComp Subsidiaries or Summagraphics or Summagraphics Subsidiaries
nor shall any such employee be entitled to enforce any provision of this Section
1.4.  Nothing contained in this Section 1.4 shall be deemed to prohibit
Summagraphics or CalComp or any of their respective Subsidiaries from
terminating any employment relationship or any employee benefit program or
changing the terms or conditions of employment or any employee benefit program
at any time following the Closing.

          1.5  Board of Directors of Summagraphics.  At the Closing,
               -----------------------------------                  
Summagraphics shall deliver to Lockheed Martin letters effecting the resignation
as of Closing of each of the then current directors of Summagraphics whose
resignation is requested in writing by Lockheed Martin prior to Closing and
Lockheed Martin shall appoint new directors by written consent.  Lockheed Martin
shall provide information with respect to the composition of the board of
directors which it will appoint for use in connection with the Proxy Statement
(as hereinafter defined).

          1.6  Officers of Summagraphics.  At the Closing, Summagraphics shall
               -------------------------                                      
deliver to Lockheed Martin letters effecting the resignation as of Closing of
each of the then current officers of Summagraphics whose resignation is
requested in writing by Lockheed Martin prior to Closing and the new Board of
Directors of Summagraphics to be appointed by written consent of Lockheed Martin
under Section 1.5 above shall appoint new officers by written consent.
Notwithstanding such resignations, it is understood and agreed that the officers
are not waiving any rights they otherwise may have under employment and
severance arrangements existing as of February 1, 1996 or any additional
arrangements approved by Lockheed Martin and CalComp.

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          1.7  Name Change.  Effective upon the Closing, Summagraphics shall
               -----------                                                  
change its name to CalComp Inc. and CalComp shall change its name to CalComp
Technologies, Inc.

          1.8  Treatment of Stock Options/Severance/Incentive Compensation.  The
               -----------------------------------------------------------      
manner in which currently outstanding employee stock options, employee severance
payments and employee incentive compensation will be treated is as reflected on
the letter attached to this Agreement as Schedule 1.8.

          1.9  Certain Definitions.  As used in this Agreement, the following
               -------------------                  
terms shall have the meanings set forth below:

          (a) "material" means material to Summagraphics or CalComp (as the case
may be) and its respective subsidiaries, taken as a whole, and determined in
light of the facts and circumstances of the matter in question; provided, that
any specific monetary amount stated in this Agreement with respect to
materiality shall determine materiality in that instance.

          (b) "Material Adverse Effect," with respect to a Party, means an
event, change or occurrence which, individually or in the aggregate, (i) is
reasonably likely to result in a reduction in the consolidated stockholders'
equity of such Party and its subsidiaries, taken as a whole, by the amount equal
to or greater than $2,000,000 for Summagraphics and $15,000,000 for CalComp or
(ii) which has a material adverse impact on the ability of such Party to
consummate the Exchange contemplated by this Agreement, provided that in
determining whether a Material Adverse Effect has occurred under either (i) or
(ii), the effect of foreign currency translations recorded in the Parties equity
in accordance with SFAS 52 for the applicable period shall be disregarded and
the adverse impact of changes in laws or regulations or accounting rules of
general applicability or interpretations thereof shall not be included.

          (c) "person" includes an individual, corporation, partnership, limited
liability company, association, trust or unincorporated organization.


          (d) "to the knowledge of" or "to the best of the knowledge of"
Summagraphics or CalComp or similar phrases includes the actual knowledge of the
current directors, the current executive officers (including the knowledge of
the chief executive officer and chief financial officer (or person performing
those functions) after reasonable inquiry) and the general counsel of
Summagraphics or CalComp, as the case may be.  For purposes of

                                     - 5 -

 
determining whether a person has actual knowledge of any fact, event, change or
occurrence, such person shall be deemed to have the knowledge relating to such
fact, event, change or occurrence which would have been gained had such person
undertaken a reasonable inquiry in respect thereto.

          (e) "Tax Returns" shall mean all Federal, state, local and foreign tax
returns, declarations, statements, reports, schedules, forms and information
returns relating to Taxes.

          (f) "Taxes" shall mean all Federal, state, local and foreign taxes,
and other assessments of a similar nature (whether imposed directly or through
withholding) including, but not limited to, income, excise, property, sales,
use, gains, transfer, franchise, payroll, value-added, withholding, employment,
license fees, customs, duties, and other taxes, assessments and charges imposed
by any governmental authority, including any interest, penalties or other
additions to tax with respect to such amounts.

                                   ARTICLE II

                        CERTAIN EVENTS PRECEDING CLOSING

                                 In addition to the conditions precedent set
forth in ARTICLES VII and VIII, the following events shall occur:

          2.1  Proxy Statement.  As promptly as practicable after the execution
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and delivery of this Agreement, and in any event on or prior to March 25, 1996,
the Parties shall prepare, and Summagraphics shall file with the Securities and
Exchange Commission (the "SEC"), preliminary proxy materials (in form and
content reasonably satisfactory to Lockheed Martin and CalComp) relating to the
approval of the Fourth Amended and Restated Articles of Incorporation (as
defined in Section 5.3), the Stock Option Plan (as defined in Section 5.8) and
the transactions contemplated hereby by the stockholders of Summagraphics and,
as promptly as practicable following receipt of SEC comments thereon, if any,
Summagraphics shall file definitive proxy materials (the "Proxy Statement") with
the SEC, which comply in form and substance with applicable SEC requirements,
taking into account such comments and mail the Proxy Statement to its
shareholders.  The Proxy Statement shall include a recommendation of the Board
of Directors of Summagraphics in favor of the Fourth Amended and Restated
Articles of Incorporation, the Stock Option Plan and the transactions
contemplated by this Agreement which shall not be changed unless the Board of
Directors of Summagraphics, upon receipt of an unsolicited written proposal or
offer which qualifies

                                     - 6 -

 
as an Acquisition Proposal within the meaning of Section 4.4 hereof or upon
delivery of a notice by Summagraphics of termination of this Agreement in
accordance with Section 10.2(b) based upon a material breach by Lockheed Martin
of a representation, warranty, covenant or agreement contained herein, shall
have received an opinion of counsel from Hughes & Luce, L.P. to the effect that
to include such recommendation or not withdraw such recommendation if it were
previously included is reasonably likely to result in a breach of the Board's
fiduciary duty under applicable law. Lockheed Martin and CalComp shall furnish
all information concerning CalComp and Lockheed Martin as may be reasonably
requested by Summagraphics in connection with the actions contemplated by this
Section 2.1.

          2.2  Interim Financing.  Simultaneously with the execution and
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delivery of this Agreement, Summagraphics and Lockheed Martin shall execute and
deliver the 9-1/4% Secured Convertible Debenture in the form attached hereto as
Exhibit A (the "Secured Convertible Debenture") pursuant to which Lockheed
Martin will make available borrowings and other forms of credit support in an
aggregate principal amount not to exceed $2,500,000 to Summagraphics for the
period between the execution and delivery of this Agreement and the Closing.

          2.3  Transfer of AGT Holdings, Inc. Stock.  As soon as practicable
               ------------------------------------                         
following May 8, 1996 and prior to Closing, CalComp shall distribute all of the
issued and outstanding capital stock of AGT Holdings, Inc., a California
corporation ("AGT") and wholly owned subsidiary of CalComp, to Lockheed Martin.
The Parties acknowledge and agree that Summagraphics shall obtain no interest in
the shares of AGT (and, consequently, the shares of Access Graphics Inc. owned
by AGT) as a result of the transactions contemplated by this Agreement.

          2.4  Additional Filings.  As promptly as practicable after the
               ------------------                                       
execution and delivery of this Agreement, each of the Parties shall prepare and
file, or cause to be filed, any and all filings necessary or appropriate for the
consummation of the transactions contemplated by this Agreement, including
without limitation, any and all foreign filings and any and all filings under
the Hart Scott Rodino Antitrust Improvements Act of 1976 (the "HSR Act"), as
contemplated by Sections 5.7 and 6.4 hereof.

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                                  ARTICLE III

                         REPRESENTATIONS AND WARRANTIES

          3.1  Representations and Warranties of Summagraphics.  In order to
               -----------------------------------------------              
induce Lockheed Martin and CalComp to enter into this Agreement and to
effectuate the transactions contemplated hereby, Summagraphics represents and
warrants to Lockheed Martin the following:

          (a) Organization and Authority.  Summagraphics is a corporation duly
incorporated, validly existing and in good standing under the laws of the State
of Delaware.  Each of the Summagraphics Subsidiaries is duly incorporated,
validly existing and in good standing under the laws of the jurisdiction in
which it is incorporated.  Each of Summagraphics and the Summagraphics
Subsidiaries (as defined in Section 3.1(d)) has all requisite power
and authority to own, lease and operate its properties and to carry on its
business as now being conducted.  Attached hereto as Schedule 3.1(a) for each of
Summagraphics and each Summagraphics Subsidiary are complete and correct copies
of (1) their charters (or other organizational documents) and all amendments
thereto to the date hereof and (2) their bylaws (or other similar governing
documents) as amended to the date hereof.

          (b)  Capital Structure.

          (1) As of the date of this Agreement, the authorized capital stock of
Summagraphics consists of 20,000,000 shares of Common Stock, $.01 par value per
share, and 5,000,000 shares of Summagraphics Preferred Stock, $.01 par value per
share.  As of the date hereof, 4,623,735 shares of Summagraphics Common Stock
are outstanding, all of which are validly issued, fully paid and nonassessable.
Summagraphics has no outstanding Preferred Stock.  As of the date hereof,
Summagraphics has outstanding options and warrants to purchase Summagraphics
Common Stock as set forth on Schedule 3.1(b)(1).

          (2) Summagraphics has no commitments to issue or sell any shares of
its capital stock or any securities or obligations convertible into or
exchangeable for such shares (other than those stock options and warrants listed
on Schedule 3.1(b)(1)), or giving any person the right to subscribe for or
acquire any such shares and no securities or obligations representing such
rights are outstanding.

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          (3) Since December 31, 1994, Summagraphics has not adjusted or amended
the exercise price of any stock option previously awarded to any officer of
Summagraphics, whether through amendment, cancellation or replacement grants, or
any other means.

          (4) Summagraphics has not issued any stock appreciation right or any
similar right entitling any person to any payment based on the value of
Summagraphics capital stock.

          (c) Authority.  The execution of this Agreement and the consummation
of the transactions contemplated hereby have been duly authorized by the Board
of Directors of Summagraphics.  Each of the Fourth Amended and Restated Articles
of Incorporation (as defined in Section 5.3) and the Stock Option Plan (as
defined in Section 5.8) have been approved by the Board of Directors of
Summagraphics with the recommendation that, together with the transactions
contemplated by this Agreement, they be submitted to the shareholders of
Summagraphics for approval.  This Agreement is the valid and binding obligation
of Summagraphics and no further corporate authorization on the part of
Summagraphics is necessary to consummate the transactions contemplated hereby or
thereby except the approval by the stockholders of Summagraphics of (i) the
Fourth Amended and Restated Articles of Incorporation pursuant to applicable
law, (ii) the Stock Option Plan and (iii) the consummation of the Exchange
pursuant to the requirements of the National Association of Securities Dealers.
Except as otherwise set forth on Schedule 3.1(c), neither the execution and
delivery of this Agreement, the consummation in accordance with the terms of
this Agreement of the transactions contemplated hereby nor compliance by
Summagraphics or any Summagraphics Subsidiary with any provision hereof or
thereof will (i) conflict with or result in a breach of any provision of their
charters or bylaws (or other governing documents) or give rise to any right of
termination, cancellation or acceleration under any of the terms, conditions or
provisions of any material note, bond, mortgage, indenture, license, agreement
or other instrument or obligation to which Summagraphics or any Summagraphics
Subsidiary is a party or by which Summagraphics or any Summagraphics Subsidiary
or any of their respective properties or assets may be bound, or (ii) violate
any order, writ, injunction, decree, statute, rule or regulation applicable to
Summagraphics or any Summagraphics Subsidiary or any of their respective
properties or assets.  Except as otherwise disclosed on Schedule 3.1(c), no
consent is required in connection with the execution and delivery by
Summagraphics of this Agreement or the consummation of the transactions
contemplated hereby.

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          (d) Subsidiaries.  Except as set forth on Schedule 3.1(d),
Summagraphics owns all the issued and outstanding shares of capital stock of
each of Summagraphics Europe N.V., Summagraphics Belgium, N.V., Summagraphics
Ltd., Summagraphics GmbH and CAD Warehouse, Inc. (collectively, the
"Summagraphics Subsidiaries").  Except as set forth on Schedule 3.1(d), other
than the Summagraphics Subsidiaries, neither Summagraphics nor any Summagraphics
Subsidiary owns any shares of capital stock of any corporation or equity
interests in any other person, nor does Summagraphics or any Summagraphics
Subsidiary have or  will have on the Closing Date any other subsidiaries.

          (e) Financial Statements.  Attached hereto as Schedule 3.1(e) are
Summagraphics' Annual Report to Stockholders and Form 10-K for the fiscal year
ended May 31, 1995 and Summagraphics' Quarterly Report on Form 10-Q for the
period ended November 30, 1995 which includes (1) the Unaudited Consolidated
Balance Sheet as of November 30, 1995; (2) the Unaudited Consolidated Statements
of Changes in Stockholders' Equity for the six months ended November 30, 1995
and 1994; (3) the Unaudited Consolidated Statement of Income for the six months
ended November 30, 1995 and 1994 and (4) the Unaudited Consolidated Statements
of Cash Flow for the six months ended November 30, 1995 and 1994 together with
the Notes to those Consolidated Statements (the "Summagraphics Financial
Statements").  Subject to the absence of certain footnote information in the
unaudited statements, the Summagraphics Financial Statements have been prepared
in accordance with generally accepted accounting principles applied on a
consistent basis throughout the periods indicated or as more particularly set
forth therein.  The Unaudited Consolidated Balance Sheets included as a part of
the Summagraphics Financial Statements present fairly as of their respective
dates the consolidated financial position and assets and liabilities of
Summagraphics.  The Unaudited Consolidated Statements of Income present fairly
the consolidated results of operations of Summagraphics for the periods
indicated.

          (f) Absence of Undisclosed Liabilities.  Except to the extent
reflected or reserved against in the Summagraphics Financial Statements or as
disclosed on Schedule 3.1(f), neither Summagraphics nor any Summagraphics
Subsidiary has (i) any liabilities or obligations of any nature or (ii) any
liabilities in the nature of employment contracts with, or agreements to pay
bonuses to any of its directors, officers or employees, other than liabilities
or obligations incurred in the ordinary course of business or specifically
identified in schedules to this Agreement.

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          (g) No Material Adverse Changes.  Since November 30, 1995, there has
been and as of the Closing there will be no material adverse change in the
assets or liabilities or in the business or condition (financial or otherwise)
of Summagraphics or any Summagraphics Subsidiary.

          (h)  Tax Matters.

          (1) Summagraphics and each of the Summagraphics Subsidiaries have
filed (or have caused to be filed on their behalf), or will file or cause to be
filed, all Tax Returns required to be filed prior to the Closing, and have paid
all Taxes required to be paid in respect of the periods covered by such Tax
Returns or, where payment of such Taxes is not yet due, have established or will
establish prior to the Closing, an adequate reserve for the payment of all Taxes
which are accruable prior to the Closing.  Summagraphics and the Summagraphics
Subsidiaries will not have any material liability for any such Taxes in excess
of the amounts so paid or the reserve so established and Summagraphics and the
Summagraphics Subsidiaries are not delinquent in the payment of any material
assessment of Taxes.  No material deficiencies for any assessment of Taxes have
been proposed, asserted or assessed against Summagraphics or the Summagraphics
Subsidiaries which would not be covered by existing reserves and, as of the date
of this Agreement, no requests for waivers of the time to assess any such Taxes
are pending.  To the best of its knowledge, Summagraphics and each of the
Summagraphics Subsidiaries, has complied with all IRS requirements regarding the
certification of taxpayer identification numbers of customers and backup
withholding.

          (2) There are no liens for any Taxes upon the assets of Summagraphics
or any Summagraphics Subsidiary, other than statutory liens for Taxes not yet
due and payable.

          (3) Neither Summagraphics nor any Summagraphics Subsidiary is a party
to, is bound by, or has any obligation under, a tax sharing agreement or
arrangement for the allocation, apportionment, sharing, indemnification, or
payment of Taxes.

          (4) Neither Summagraphics nor any Summagraphics Subsidiary is a party
to any agreement, contract or other arrangement that would result, separately or
in the aggregate, in the requirement to pay any "excess parachute payments"
within the meaning of Section 280G of the Code, or any gross-up in connection
with such an agreement, contract or arrangement.

                                     - 11 -

 
          (i) Property.

          (1) Summagraphics and the Summagraphics Subsidiaries own all operating
real properties reflected as owned by them in the Summagraphics Financial
Statements free and clear of all mortgages, liens, pledges, charges or
encumbrances of any nature whatsoever (collectively, "Encumbrances"), except (i)
liens for current taxes not yet due and payable, (ii) mortgages, deeds of trust
or other Encumbrances reflected in the Summagraphics Financial Statements, (iii)
such imperfections of title, easements and other Encumbrances as do not detract
from or interfere with the present use of such operating real properties subject
thereto or affected thereby, (iv) Encumbrances incurred in the ordinary course
of business after the date of this Agreement with the written consent of
Lockheed Martin, and (v) Encumbrances disclosed on Schedule 3.1(i)(1)(v)
attached hereto.

          (2) As of the date of this Agreement, substantially all tangible real
or personal property and assets material to the business operation or financial
condition of Summagraphics and the Summagraphics Subsidiaries on a consolidated
basis which are owned by them or in which any of them has an interest (other
than a security interest) are in good operating condition and repair, ordinary
wear and tear excepted.

          (3) All leases material to Summagraphics and the Summagraphics
Subsidiaries on a consolidated basis pursuant to which Summagraphics and the
Summagraphics Subsidiaries lease real property are valid and effective in
accordance with their respective terms, subject to bankruptcy, insolvency,
reorganization, moratorium and similar laws, and there is not, under any such
leases, any existing default by Summagraphics or the Summagraphics Subsidiaries
or any event which with notice or lapse of time or both would constitute such a
material default.

          (j) Litigation.  Other than as set forth in Schedule 3.1(j), neither
Summagraphics nor any of the Summagraphics Subsidiaries is a party to any
pending or, to the best of Summagraphics' knowledge, threatened claim, action,
suit, investigation or proceeding, nor is Summagraphics or any of the
Summagraphics Subsidiaries subject to any order, judgment or decree.  Except as
set forth on Schedule 3.1(j), neither Summagraphics nor any of the Summagraphics
Subsidiaries is subject to any agreement, memorandum of understanding or similar
arrangement with any regulatory authority restricting its operations or
requiring that certain actions be taken, and, neither Summagraphics nor any of
the Summagraphics Subsidiaries has

                                     - 12 -

 
received any notification from any governmental or regulatory authority, or the
staff thereof, asserting that it is not in compliance with any statutes,
regulations or ordinances which such authority enforces.

          (k) Contracts and Commitments.  Except as reflected in the
Summagraphics Financial Statements or as set forth on Schedule 3.1(k), neither
Summagraphics nor the Summagraphics Subsidiaries has as of the date hereof and,
except to the extent consented to in writing by Lockheed Martin, neither
Summagraphics nor any of the Summagraphics Subsidiaries will have on the
Closing Date:

          (1) any bonus, stock option or stock appreciation right or similar
plans, deferred compensation plans, profit-sharing, retirement arrangements or
other fringe benefit plans (other than those terminable at will by Summagraphics
or the Summagraphics Subsidiary) nor any outstanding calls, commitments or
agreements of any character requiring the issuance of shares of its capital
stock;

          (2) any debt obligations for borrowed money (including guaranties or
agreements to acquire such debt obligations of others);

          (3) any outstanding loans to any person;

          (4) any agreement for services or for the purchase or disposition of
any equipment or supplies except those incurred in the ordinary course of
business;

          (5) any lease of personal property with annual rent aggregating
$50,000 or more;

          (6) any agreement or contract with any third party for the provision
of services to Summagraphics or the Summagraphics Subsidiaries which involves
payment by Summagraphics or the Summagraphics Subsidiaries of more than $10,000
per month and which (i) has more than six months to run from the date of this
Agreement or (ii) may not be canceled by Summagraphics or the Summagraphics
Subsidiaries as appropriate on 180 days notice or less without penalty; or

          (7) any outstanding loans to or loan participations with its officers,
directors, significant stockholders (collectively "Insiders"), or to firms,
partnerships or corporations in which any Insiders are partners, executive

                                     - 13 -

 
officers, directors or significant stockholders or to any Affiliate of an
Insider or any contract, arrangement or understanding with any Insider or any
Affiliate of any Insider requiring Summagraphics or any Summagraphics
Subsidiaries to perform services or make payments in the future.

          (l) Accuracy of Information Supplied.  As of their respective filing
dates, Summagraphics' Annual Reports on Form 10-K for the fiscal years ended May
31, 1995 and 1994, and any other filings made from and after the date of such
latest Annual Report on Form 10-K with the SEC pursuant to the Securities
Exchange Act of 1934, as amended (the "Exchange Act") (such filings being
collectively referred to herein as the "Summagraphics Filings") complied in all
material respects with the regulations of the SEC, and none of the Summagraphics
Filings, as of the respective dates thereof, contained any untrue statement of a
material fact or omitted to state a material fact required to be stated therein
or necessary to make the statements made therein not misleading.  The
information that will be included (other than information provided in writing by
Lockheed Martin specifically for inclusion in the Proxy Statement) in the Proxy
Statement or any amendment or supplement thereto pertaining to the transactions
contemplated hereby that is filed with the SEC, at the time the Proxy Statement
is filed and distributed to stockholders of Summagraphics, will not contain any
untrue statement of a material fact or omit to state any material fact required
to be stated therein in order to make the statements not misleading, provided
that information as of a later date shall be deemed to modify information of an
earlier date. This representation and warranty is being made solely for the
benefit of Lockheed Martin and CalComp and is not intended, nor shall it be
deemed to, create any rights in any third party.

          (m) Summagraphics' Employee Benefit Plans.  Attached hereto as
Schedule 3.1(m) is a true, correct and complete list of each employee benefit
plan (each, a "Plan") to which Summagraphics or any Summagraphics Subsidiaries
is a party, together with, as applicable, a true and correct copy of (i) the
most recent annual report (Form 5500, 5500-C or 5500-R, as appropriate) filed
with the IRS including audited financial reports, if any, (ii) each IRS
favorable determination letter or opinion letter for each such Plan (or copies
of any current pending correspondence in respect thereof) (iii) all Plan
documents for each such Plan, (iv) each applicable Summary Plan Description, and
(v) the most recent actuarial report or valuation relating to each tax-qualified
plan, or the equivalent of any of the foregoing under applicable law, if any.
Except as set forth on Schedule 3.1(m):

                                     - 14 -

 
          (1) There are no plans, programs, contracts, understandings or
arrangements of any type (whether oral or written) of Summagraphics or a
"Commonly Controlled Entity" (within the meaning of Sections 414(b), (c), (m),
(n) or (o) of the Code or regulations thereunder) which provide for pension,
profit sharing, savings, executive compensation, incentive compensation, company
cars or car allowances, deferred compensation, severance pay, bonuses, stock
options, stock purchases, welfare, group insurance, medical disability, life,
health, hospitalization, dental, vacation, sick pay, holiday, educational
assistance, or any other form of employee or former employee benefits, whether
established by contract, policy, custom or course of dealing, (including, but
not limited to plans described in Section 3(3) of the Employee Retirement Income
Security Act of 1974, as amended ("ERISA"); and neither Summagraphics nor a
Commonly Controlled Entity has previously sponsored or contributed to any such
plan, program, contract, understanding or arrangement other than as listed and
described on Schedule 3.1(m);

          (2) Neither Summagraphics nor any Commonly Controlled Entity has ever
maintained a Plan which is subject to Title IV of ERISA;

          (3) Neither Summagraphics nor any Commonly Controlled Entity has ever
been a party to any collective bargaining agreement;

          (4) Neither Summagraphics nor any Commonly Controlled Entity has ever
maintained a "multi-employer plan" within the meaning of Sections 3(37) and
4001(a)(3) of ERISA, a "multiple employer plan" within the meaning of Section
413 of the Code, or a "multiple employer welfare arrangement" within the meaning
of Section 3(40) of ERISA;

          (5) With respect to the Plans which are "welfare plans" within the
meaning of Section 3(1) of ERISA:  (i) none of those Plans provide medical or
death benefits (whether or not insured) with respect to current or former
employees beyond their termination of employment other than as required by
applicable law; and (ii) each of those Plans have been operated in material
compliance with the provisions of Section 4980B of the Code and Part 6 of Title
I of ERISA and all other applicable laws concerning continuation or conversion
of coverage; and (iii) none of those Plans have any reserves, assets, surplus or
prepaid premiums;

          (6) With respect to each of the Plans:  (i) if intended to qualify
under Section 401(a) or 403(a) of the Code, the

                                     - 15 -

 
Plan has been maintained and administered at all times in full compliance with
its terms and applicable laws and regulations and has been so qualified during
the period from its adoption to date and the trust forming a part thereof is
exempt from taxation pursuant to Section 501(a) of the Code, a favorable
determination letter as to qualification under Section 401 of the Code has been
issued and any amendments required for continued qualification under Section 401
of the Code have been timely adopted and nothing has occurred subsequent to the
date of such determination letter that could reasonably be expected to adversely
affect the qualified status of such Plan; (ii) no event has occurred and there
exists no circumstance under which Summagraphics could directly, or indirectly
through a Commonly Controlled Entity, incur any liability with respect to any
current or former employee (or any beneficiary of any current or former
employee) of Summagraphics or any Commonly Controlled Entity under ERISA, the
Code or otherwise (other than the normal cost of benefits occurring in the
ordinary course under the unfunded Plans); (iii) there are no actions, suits or
claims pending or threatened with respect to any Plan or against any fiduciary
or the assets of any Plan (other than claims for benefits in the ordinary
course) and there are no facts which could give rise to any such actions, suits
or claims, and no Plan is under audit or investigation by any governmental
authority; (iv) no event has occurred with respect to any Plan or any employee
benefit plan sponsored, maintained or contributed to by Summagraphics or a
Commonly Controlled Entity which could be reasonably expected to subject any
Plan, Summagraphics or any Party directly or indirectly (through indemnification
agreement or otherwise) to any liability for or as a result of a breach of
fiduciary duty, a "prohibited transaction" within the meaning of Section 406 of
ERISA or Section 4975 of the Code, or a civil penalty under Section 502 of ERISA
or a tax under Section 4971 of the Code; (v) no "reportable event" (as defined
in Section 4043 of ERISA) has occurred; (vi) no "accumulated funding deficiency"
(as defined in Section 302 of ERISA or Section 412 of the Code) has occurred;
(vii) all contributions required to be made to, or benefit liabilities arising
under, any Plan for all periods prior to the date hereof and the Closing Date
have been, or will as of the Closing Date be, paid or accrued; (viii) all
contributions intended to be deductible have met the requirements for
deductibility under the Code; (ix) each Plan is in compliance with the annual
reporting requirements under ERISA and the Code; (x) each Plan has been operated
in accordance with its terms and with all applicable laws, including, but not
limited to ERISA, the Code, federal securities laws and state insurance and
health care continuation and conversion laws.

                                     - 16 -

 
          (7) Except as set forth on Schedule 3.1(m)(vii), consummation of the
transactions contemplated by this Agreement will not (i) entitle any individual
to any bonus, incentive or severance pay or payments, or (ii) accelerate the
time of payment or vesting of any benefit under any Plan, increase the amount of
compensation due to any individual from Summagraphics prior to, or after the
Closing Date, or increase any benefits otherwise payable under any Plan, (iii)
result in the payment of an amount subject to the provisions of Section 280G of
the Code, or (iv) give rise to any liability or obligation of Summagraphics
pursuant to any Plan.

          (8) Except as previously consented to in writing by Lockheed Martin,
since November 30, 1995, neither Summagraphics nor a Commonly Controlled Entity
has adopted or communicated to employees of Summagraphics any change to, or
termination of, any Plan or the adoption of a new employee benefit plan or
arrangement affecting the employees of Summagraphics or their dependents.

          (9) Except in the normal course of business, neither Summagraphics nor
any Summagraphics Subsidiaries is bound to make, nor has Summagraphics or any
Summagraphics Subsidiary proposed the making of, bonus or incentive or other
similar payments to any employees or consultants at any future date or an
increase to the compensation of any employee or consultant.  None of
Summagraphics nor any Summagraphics Subsidiaries will be liable by reason of
this Agreement or any of the transactions contemplated hereby, to make payments
to employees by way of damages or compensation for loss of office or for
redundancy or unfair dismissal or any like payment, other than payments of
severance benefits under Plans disclosed in this Agreement as contemplated by
Section 1.8.

          (n) Environmental Matters.  (i) For purposes of this Section 3.1(n)
and Section 3.2(j), the following terms shall have the indicated meaning:

          "Environmental Law" means any federal, state, local or foreign law
     (including case or common law), statute, ordinance, rule, regulation, code,
     license, permit, authorization, approval, consent, order, judgment, decree,
     injunction or agreement with any governmental entity relating to (i) the
     protection, preservation or restoration of the environment (including,
     without limitation, air, water vapor, surface water, groundwater, drinking
     water supply, surface soil, subsurface soil, plant and animal life or any
     other natural resource), or (ii) the use, storage, recycling, treatment,
     generation,

                                     - 17 -

 
     transportation, processing, handling, labeling, production,
     release or disposal of Hazardous Substances.  The term "Environmental Law"
     includes without limitation (i) the Comprehensive Environmental Response,
     Compensation and Liability Act ("CERCLA"), as amended, 42 U.S.C. (S) 9601,
     et seq; the Resource Conservation and Recovery Act ("RCRA"), as amended, 42
     U.S.C. (S) 6901, et seq; the Clean Air Act, as amended, 42 U.S.C. (S) 7401,
     et seq; the Federal Water Pollution Control act, as amended, 33 U.S.C. (S)
     1251, et seq; the Toxic Substances Control Act, as amended, 15 U.S.C. (S)
     9601, et seq; the Emergency Planning and Community Right to Know Act, 42
     U.S.C. (S) 11001, et seq; the Safe Drinking Water Act, 42 U.S.C. (S) 300f,
     et seq; the Solid Waste Disposal Act, as amended; and all comparable state
     and local laws, and (ii) any common law (including without limitation
     common law that may impose strict liability) that may impose liability or
     obligations for injuries or damages due to, or threatened as a result of,
     the presence of or exposure to any Hazardous Substance.

          "Hazardous Substance(s)" means any substance that is toxic, ignitable,
     reactive, corrosive, radioactive, or caustic or is regulated as a hazardous
     substance, contaminant, toxic substance, toxic pollutant, hazardous waste,
     or pollutant, including without limitation, petroleum, its derivatives, by-
     products and other hydrocarbons, or is otherwise regulated under or the
     subject of applicable Environmental Laws.

          "Remedial Action" means the investigation, removal, clean-up or
     remediation of contamination, environmental degradation or damage arising
     from or related to the generation, use, handling, treatment, storage,
     transportation, disposal, discharge, release, threatened release or
     emission of Hazardous Substances, including without limitation,
     investigations, responses and remedial actions under CERCLA, corrective
     action under RCRA 42 U.S.C. (S)(S)3004(u) and (v), 3008(h) and 7003, and
     clean-up requirements under Environmental Laws.

          (ii) Except as set forth on Schedule 3.1(n)(ii), neither
Summagraphics, any of the Summagraphics Subsidiaries, nor any properties owned
or operated by Summagraphics or any of the Summagraphics Subsidiaries or in
which any such entity has a security interest, has been, or is, in violation of
or liable under any Environmental Law.

                                     - 18 -

 
          (iii) Except as set forth on Schedule 3.1(n)(iii), there are no
actions, suits or proceedings, or demands, claims, notices or investigations
(including without limitation notices, demand letters or requests for
information from any environmental agency) instituted, pending or, to the best
knowledge of Summagraphics, threatened, relating to the liability of any
properties owned or operated by Summagraphics or any of the Summagraphics
Subsidiaries or in which such entity has a security interest under any
Environmental Law.

          (iv) The facilities occupied or used by Summagraphics or any of the
Summagraphics Subsidiaries and any other real property presently or formerly
owned by, used by or leased to or by Summagraphics or any of the Summagraphics
Subsidiaries or any predecessor of Summagraphics or any of the Summagraphics
Subsidiaries (collectively, the "Property"), the existing and prior uses of such
Property and all operations of the businesses of Summagraphics or any of the
Summagraphics Subsidiaries or any predecessor of Summagraphics or any of the
Summagraphics Subsidiaries comply, and have at all times complied, in all
material respects with all Environmental Laws and each of Summagraphics and the
Summagraphics Subsidiaries is not in violation of nor has it violated, in
connection with the ownership, use, maintenance or operation of such Property or
the conduct of its business, any Environmental Law.

          (v) Except as set forth on Schedule 3.1(n)(v), each of Summagraphics
and the Summagraphics Subsidiaries has all material permits, registrations,
approvals and licenses required by any governmental agency under any
Environmental Law.

          (vi) Except as set forth on Schedule 3.1(n)(vi), there has been no
spill, discharge, leak, emission, injection, disposal, escape, dumping or
release of any kind on, beneath or above such Property or into the environment
surrounding such Property of any Hazardous Substances in violation of
Environmental Laws or requiring Remedial Action.

          (vii) Except as set forth on Schedule 3.1(n)(vii), there has been no
past, and there is no current or anticipated storage, disposal, generation,
manufacture, refinement, transportation, production or treatment of any
Hazardous Materials at, upon or from such Property. No asbestos-containing
materials, underground storage tanks or polychlorinated biphenyls (PCBs) are
located on such Property.

                                     - 19 -

 
          (viii) There are no claims, notices of violations, notice letters,
investigations, inquiries or other proceedings now pending or, to the best
knowledge of Summagraphics, threatened, by any governmental entity or any
foreign governmental entity or third party with respect to the business or any
in connection with any actual or alleged failure to comply with any requirement
of any Environmental Law.

          (o) Employees; Directors and Officers.  Schedule 3.1(o) sets forth a
true, correct and complete list of all employees of Summagraphics and each
Summagraphics Subsidiary together with current annual or hourly compensation.
In addition, Schedule 3.1(o) identifies each director and officer of
Summagraphics and each of the Summagraphics Subsidiaries.

          (p) Compliance with Laws.  Except as set forth on Schedule 3.1(p),
neither Summagraphics nor any Summagraphics Subsidiaries (i) is in violation of
any law, order or permit applicable to its business or (ii) has received any
notification or communication from any agency or federal, state or local
government or any regulatory authority or the staff thereof (a) asserting that
either Summagraphics or any of the Summagraphics Subsidiaries is not in
compliance with any law or order; or (b) threatening to revoke any material
permits, or (c) requiring either Summagraphics or any Summagraphics Subsidiaries
(1) to enter into or consent to the issuance of a cease and desist order, formal
agreement, directive, commitment or memorandum of understanding or (2) to adopt
any Board resolution or similar undertaking which restricts materially the
conduct of its business, or in any manner relates to its capital adequacy, its
management, or the payment of dividends.

          (q) Insurance.  Summagraphics and the Summagraphics Subsidiaries are
presently insured, and since December 31, 1993 have been insured, for reasonable
amounts with financially sound and reputable insurance companies, against such
risks as companies engaged in a similar business would, in accordance with good
business practice, customarily be insured. All of the insurance policies and
bonds maintained by Summagraphics and the Summagraphics Subsidiaries are in full
force and effect, Summagraphics and the Summagraphics Subsidiaries are not in
material default thereunder, and all material claims thereunder have been filed
in due and timely fashion. Summagraphics and the Summagraphics Subsidiaries have
no knowledge of any material inaccuracy in any application for such policies or
binders, any failure to pay premiums when due or any similar state of facts that
might form the basis for termination of any such insurance. Summagraphics and
the Summagraphics Subsidiaries have no knowledge 

                                     - 20 -

 

of any state of facts or of the occurrence of any event that is reasonably 
likely to form the basis for any claim against it not fully covered (except to
the extent of any applicable deductible) by the policies or binders referred 
to above.

          (r) Applicable Takeover Laws.  Summagraphics has taken all necessary
action to exempt (i) the transactions contemplated by this Agreement (including,
without limitation, the issuance of the Secured Convertible Debenture and the
Summagraphics Exchange Shares) and (ii) any transaction between or among
Lockheed Martin and any other Party after the Closing (to the extent that
applicable law permits the exemption of any such transaction therefrom), from
any applicable anti-takeover laws including, without limitation, the provisions
of Section 203 of the Delaware General Corporation Law to the extent applicable.
In addition, Summagraphics has taken all action necessary or appropriate so that
the entering into this Agreement and the consummation of the transactions
contemplated by this Agreement will be exempt from any change of control or
anti-takeover provisions of the Articles of Incorporation, Bylaws, or other
governing instruments of Summagraphics or any Summagraphics Subsidiaries and
will not restrict or impair the ability of Lockheed Martin to vote, or otherwise
to exercise the rights of a stockholder with respect to, shares of Summagraphics
or any Summagraphics Subsidiaries that may be acquired or controlled by Lockheed
Martin.

          (s) Product and Service Warranty.  Except as set forth on Schedule
3.1(s), no product manufactured, sold, leased or delivered by Summagraphics or
any Summagraphics Subsidiaries nor any service rendered by Summagraphics or any
Summagraphics Subsidiaries, is subject to any guaranty, warranty, or other
indemnity.  Each product manufactured, sold, leased, or delivered by
Summagraphics, and each service rendered by Summagraphics, has conformed with
all applicable contractual commitments and all express and implied warranties.
Neither Summagraphics nor any Summagraphics Subsidiary has any liability and
there is no basis for any present or future action, suit, proceeding, hearing,
investigation, charge, complaint, claim or demand against any of Summagraphics
or any Summagraphics Subsidiary that would be reasonably likely to give rise to
any liability or claim for replacement or repair thereof or other damages in
connection therewith. There is no basis for any present or future action, suit,
proceeding, hearing, investigation, charge, complaint, claim or demand against
Summagraphics or any Summagraphics Subsidiaries that could reasonably be
expected to give rise to any liability arising out of any injury to individuals
or property as a result of the ownership, possession or use of any product
manufactured, sold,

                                     - 21 -

 
leased or delivered by Summagraphics or any of its Subsidiaries or any service
rendered by Summagraphics or any of its Subsidiaries.

          (t) Summagraphics Common Stock to be Issued.  Each share of
Summagraphics Common Stock to be issued to Lockheed Martin in connection with
the consummation of the transactions contemplated by this Agreement, when
issued, will be validly authorized and issued, fully paid and non-assessable.
Immediately following Closing, Lockheed Martin will own 89.7% of the issued and
outstanding capital stock of Summagraphics on a Fully Diluted Basis.  There are
no existing options, subscriptions, warrants, rights, contracts, commitments,
understandings, arrangements, or agreements of any nature to which Summagraphics
or any Summagraphics Subsidiaries are a party or by which any of them are bound,
relating to the issuance, sale, delivery or transfer of the Summagraphics
Exchange Shares other than this Agreement.

          (u) Labor Disputes.  There is neither pending nor, to the best
knowledge of Summagraphics, threatened, any labor dispute, strike or work
stoppage which adversely affects or which may adversely affect Summagraphics'
business or the business of any Summagraphics Subsidiaries or which may
interfere with the continued operation of Summagraphics' business or the
business of any Summagraphics Subsidiaries after Closing.  Except as set forth
on Schedule 3.1(u) attached hereto, neither Summagraphics nor any agents,
representatives or employees of Summagraphics, in connection with its business,
has committed any unfair labor practice as defined in the National Labor
Relations Act of 1947, as amended, and there is not now pending nor, to the
knowledge of Summagraphics, threatened any unfair labor practice charge against
Summagraphics or any Summagraphics Subsidiaries within the jurisdiction of the
National Labor Relations Board or any representative thereof or the jurisdiction
of any similar state, local or foreign authority.  Except as set forth on
Schedule 3.1(u), (i) there are no employment agreements, collective bargaining
agreements or other agreements relating to employment between Summagraphics or
any Summagraphics Subsidiaries and any of their respective employees, and (ii)
no employee of Summagraphics has any contractual right to continued employment
with Summagraphics or any Summagraphics Subsidiaries following consummation of
the transactions contemplated by this Agreement.

          (v) Technology.  Summagraphics owns, or is licensed or otherwise
entitled to use or (with respect to such of the following which pertain only to
Summagraphics' business as conducted or proposed to be conducted) can obtain on
reasonable terms rights to all patents, trademarks, tradenames, servicemarks,
copyrights,

                                     - 22 -

 
schematics, technology, know-how, computer software programs or applications in
tangible or intangible proprietary information or material that are used or
proposed to be used in the business of Summagraphics or any Summagraphics
Subsidiaries as currently conducted or as presently proposed to be conducted by
Summagraphics or any Summagraphics Subsidiaries (the "Summagraphics Intellectual
Property Rights"). Schedule 3.1(v) lists all patents, patent applications,
trademarks, tradenames, and servicemarks including all registrations for, and
pending applications to register, such trademarks, tradenames and servicemarks,
included in the Summagraphics Intellectual Property Rights, together with a list
of all Summagraphics' currently marketed software products and an indication as
to which, if any, of such software products have been registered for copyright
protection with the United States Patent & Trademark Office. Except as set forth
on Schedule 3.1(v), no claims with respect to the Summagraphics Intellectual
Property Rights have been asserted, or to the knowledge of Summagraphics, are
threatened by any person nor does Summagraphics or any Summagraphics Subsidiary
know of any valid grounds for any bona fide claim (i) to the effect that the
manufacture, sale or use of any product or process as now used or offered or
proposed for use or sale by Summagraphics or any Summagraphics Subsidiary
infringes on any patents of any person, (ii) against the use by Summagraphics or
any Summagraphics Subsidiary of any trademarks, tradenames, trade secrets,
copyrights, technology, know-how, processes or computer software programs and
applications used in the business of Summagraphics and the Summagraphics
Subsidiaries as currently conducted or presently proposed to be conducted or
(iii) challenging the ownership, validity or effectiveness of any of the
Summagraphics Intellectual Property Rights. To Summagraphics' knowledge, all
granted and issued patents and all registered trademarks listed on Schedule
3.1(v) and all copyrights held by Summagraphics are valid and existing. To
Summagraphics' knowledge, there is no unauthorized use, infringement or
misappropriation of any of the Summagraphics Intellectual Property Rights by any
third party, employee or former employee.

          (w) Opinion of Financial Advisor.  Summagraphics has been advised in
writing by its financial advisor, Needham & Company, Inc., that in its opinion,
as of the date hereof, the terms of the transactions described herein are fair,
from a financial point of view, to Summagraphics and its stockholders.  A copy
of that opinion is attached hereto as Schedule 3.1(w).

          (x) Books and Records.  The books of account, stock records, minute
books and other records of Summagraphics and the Summagraphics Subsidiaries are
complete and correct in all material

                                     - 23 -

 
respects and have been maintained in accordance with good business practices,
and the matters contained therein are appropriately and accurately reflected in
the Summagraphics Financial Statements.

          (y) Full Disclosure.  No statement contained in any certificate or
schedule furnished or to be furnished by Summagraphics to Lockheed Martin or
CalComp in, or pursuant to the provisions of, this Agreement contains or shall
contain any untrue statement of a material fact or omits or shall omit to state
any material fact necessary, in light of the circumstances under which it was
made, in order to make the statements herein or therein not misleading.

          (z) Investment Representation.  Summagraphics is aware that the
CalComp Exchange Shares are not registered under the Securities Act of 1933 (the
"Securities Act").  Summagraphics possesses such knowledge and experience in
business matters that it is capable of evaluating the merits and risks of its
investments hereunder.  Summagraphics has been provided access to all
information and personnel as Summagraphics deems necessary or advisable in
connection with its investment decision hereunder.  Summagraphics is acquiring
the CalComp Exchange Shares for its own account, for investment purposes only
and not with a view to distribution thereof.  Summagraphics agrees not to sell,
transfer, offer for sale, pledge, hypothecate or otherwise dispose of the
CalComp Exchange Shares, without registration under the Securities Act, except
pursuant to a valid exemption from registration under the Securities Act.

          (aa) Banks and Financial Institutions.  Schedule 3.1(aa) sets forth a
true, correct and complete list of each bank or financial institution from which
Summagraphics currently has outstanding indebtedness together with the aggregate
amount outstanding as of the date of this Agreement.  Attached to schedule
3.1(aa) is a true, correct and complete copy of each agreement listed thereon.

          (bb) Backlog.  At and as of May 31, 1996, Summagraphics shall have
received bona fide purchase orders for sales in the "input" and "cutter"
portions of Summagraphics business ("Backlog") which management of Summagraphics
reasonably believes will result in net sales of not less than $2,750,000 and
which Backlog is reasonably expected to be filled in accordance with the terms
thereof.  In the event that the Closing occurs prior to May 31, 1996,
Summagraphics shall have Backlog which, together with prospective orders
expected by May 31, 1996, management reasonably

                                     - 24 -

 
believes will result in Backlog of not less than $2,750,000 in the aggregate as
of May 31, 1996.

     3.2  Representations and Warranties of CalComp.  In order to induce
          -----------------------------------------                     
Summagraphics to enter into this Agreement and to consummate the transactions
contemplated hereby, CalComp represents and warrants to Summagraphics as
follows:

          (a) Organization, Standing and Power.  CalComp is a corporation duly
organized, validly existing and in good standing under the laws of the State of
California and, has all requisite corporate power and authority to own, lease
and operate its properties and to carry on its business as now being conducted.
Each of the CalComp Subsidiaries has all requisite power and authority to own,
lease and operate the properties and to carry on its business as now being
conducted.


          (b)  Capital Structure.

          (i) As of the date hereof, the authorized capital stock of CalComp
consists of 1,000 shares of Common Stock of which 1,000 shares are issued and
outstanding.  As of the date hereof and as of the Closing Date, all outstanding
shares of capital stock of CalComp have been validly issued and are fully paid
and nonassessable.  Lockheed Martin owns 100% of the issued and outstanding
shares of capital stock of CalComp.

          (ii) CalComp has no commitments to issue or sell any shares of its
capital stock or any securities or obligations convertible into or exchangeable
for such shares, or giving any person the right to subscribe for or acquire any
such shares and no securities or obligations representing such shares are
outstanding.

          (c) Authority.  The execution and delivery of this Agreement and the
consummation of the transactions contemplated hereby have been duly and validly
authorized by each of the Board of Directors and sole stockholder of CalComp and
this Agreement is the valid and binding obligation of CalComp.  Except for the
Joint Venture (as defined in Section 3.2(d) below), neither the execution and
delivery of this Agreement nor the consummation of the transactions contemplated
hereby or thereby, nor compliance by CalComp and the CalComp Subsidiaries with
any of the provisions hereof or thereof will (i) conflict with or result in a
breach of any provision of CalComp's Articles of Incorporation or Bylaws, or
conflict with or result in a default or give rise to any right of termination,
cancellation or acceleration under any of the terms, conditions or provisions of
any material note, bond, mortgage,

                                     - 25 -

 
indenture, license, agreement or other instrument, or violate the provisions of
any agreement to which CalComp is a party or by which it or any of its
properties or assets may be bound in any instance in which such right of
termination, cancellation, or acceleration if exercised or such violation would
have a Material Adverse Effect, or (ii) violate any order, writ, injunction,
decree, statute, rule or regulation applicable to CalComp or any CalComp
Subsidiaries or any of its properties or assets. Except for CalComp's Joint
Venture affiliate, no consent or approval by any governmental authority is
required for the execution and delivery by CalComp of this Agreement and the
consummation of the transactions contemplated hereby, except for the approval of
all the applicable regulatory agencies and meeting of conditions herein set
forth.

          (d) Subsidiaries.  Schedule 3.2(d) sets forth a true, correct and
complete list of each corporation of which CalComp directly or indirectly owns
all of the issued and outstanding shares of capital stock (collectively, the
"CalComp Subsidiaries").  In addition, CalComp owns 1,706 shares (out of a total
of 3,887 shares) of NS CalComp Corporation (Japan) as part of a joint venture
with Nippon Steel Corporation (which owns 1,978 Shares) and Sumitomo Corporation
(which owns 194 Shares) (the "Joint Venture").  Other than the CalComp
Subsidiaries and the Joint Venture, CalComp owns no shares of capital stock of
any other corporation or equity interest in any other person, and has and will
have on the Closing Date no other subsidiaries.  The Parties acknowledge that as
of the Closing, CalComp will not own and will not have any interest in the
following subsidiaries: AGT Holdings, Inc., Access Graphics, Inc., Advanced
Products Group, Inc. (Georgia), CAD Source, Inc., Access Graphics (U.K.) Ltd.,
Access Graphics of Canada Inc., Access Graphics B.V. and Access Graphics S.A. de
C.V. CalComp is currently dissolving CalComp Foreign Sales Corp. (Barbados) and
therefore does not represent that as of the date of signing of this Agreement
nor as of the Closing Date that it does or will own such subsidiary.

          (e) Financial Statements.  Attached hereto as Schedule 3.2(e) are the
Consolidated Balance Sheets of CalComp for each of the fiscal years ended
December 31, 1995 and 1994, the Consolidated Income Statement of CalComp for
each of the years in the three year period ended December 31, 1995, Statement of
Shareholders' Equity for each of the years ended in the three year period ended
December 31, 1995 and the Consolidated Statement of Cash Flow of CalComp for
each of the years in the three year period ended December 31, 1995, each
prepared on a basis which treats the disposition of AGT as if it had occurred
prior to the date of such

                                     - 26 -

 
financial statements. Subject to the absence of certain footnote information in
the financial statements attached as Schedule 3.2(e), those financial statements
have been prepared in accordance with generally accepted accounting principles
applied on a consistent basis throughout the periods indicated or as more
particularly set forth therein. The Balance Sheets of CalComp for each of the
fiscal years ended December 31, 1995 and 1994 present fairly as of their
respective dates the consolidated financial position and assets and liabilities
of CalComp. The Consolidated Income Statement of CalComp for each of the years
in the three year period ended December 31, 1995, present fairly the
consolidated results of operations of CalComp for the periods indicated. The
CalComp Financial Statements to be delivered in accordance with the provisions
of Section 6.5 to Summagraphics will, at the time they are so delivered be
prepared in accordance with generally accepted accounting principles applied on
a consistent basis throughout the periods indicated, except that the CalComp
Financial Statements will be prepared on a basis to reflect the disposition of
AGT as contemplated by Section 2.4.

          (f) Absence of Undisclosed Liability.  Except to the extent reflected
or reserved against in the CalComp Financial Statements, neither CalComp nor any
CalComp Subsidiary as of the date of this Agreement has (i) any liabilities or
obligations of any nature or (ii) any liabilities in the nature of employment
contracts with, or agreements to pay bonuses to any of its directors, officers
or employees, other than liabilities or obligations incurred in ordinary course
of business or specifically identified in schedules to this Agreement.

          (g) No Material Adverse Change.  Since December 31, 1995, there has
been and as of the Closing there will be no material adverse change in the
assets or liabilities or in the business or condition (financial or otherwise),
results of operations or prospects of CalComp.

          (h) Litigation.  There are no actions, proceedings or investigations
pending or, to the best of CalComp's knowledge, threatened against CalComp or
its Subsidiaries which, in the opinion of CalComp's in-house counsel is likely
to have a Material Adverse Effect on the financial conditions or operations of
CalComp and its subsidiaries.  Neither CalComp nor any of its Subsidiaries is
subject to any agreement, memorandum of understanding or similar arrangement
with any regulatory authority restricting its operations or requiring that
certain actions be taken, and, neither CalComp nor any of its Subsidiaries has
received any notification from any governmental or regulatory authority, or the
staff

                                     - 27 -

 
thereof, asserting that it is not in compliance with any statutes, regulations
or ordinances which such authority enforces, noncompliance with which could
reasonably be expected to have, individually or in the aggregate, a Material
Adverse Effect on the financial conditions of CalComp and its Subsidiaries.

          (i) Accuracy of Information Supplied.  The information that will be
provided in writing by CalComp specifically for inclusion in the Proxy Statement
or any amendment or supplement thereto pertaining to the transactions
contemplated hereby that is filed with the SEC, at the time the Proxy Statement
is filed and distributed to stockholders of Summagraphics will not contain any
untrue statement of a material fact or omit to state any material fact required
to be stated therein in order to make the statements not misleading, provided
that information as of a later date shall be deemed to modify information of an
earlier date.  This representation and warranty is being made solely for the
benefit of Summagraphics and Lockheed Martin and is not intended, nor shall it
be deemed to, create any rights in any third party.

          (j) Environmental Matters.  (i) To the best knowledge of CalComp, and
except as set forth on Schedule 3.2(j), neither CalComp, any of the CalComp
Subsidiaries, nor any properties owned or operated by CalComp or any of the
CalComp Subsidiaries or in which any such entity has a security interest, has
been or is in violation of or liable under any Environmental Law.

          (ii) Except as set forth on Schedule 3.2(j), there are no actions,
suits or proceedings, or demands, claims, notices or investigations (including
without limitation notices, demand letters or requests for information from any
environmental agency) instituted, pending or threatened relating to the
liability of any properties owned or operated by CalComp or any of the CalComp
Subsidiaries or in which such entity has a security interest under any
Environmental Law.

          (iii) To the best knowledge of CalComp, the facilities occupied
or used by CalComp or any of the CalComp Subsidiaries and any other real
property presently or formerly owned by, used by or leased to or by CalComp or
any of the CalComp Subsidiaries or any predecessor of CalComp or any of the
CalComp Subsidiaries (collectively, the "Property"), the existing and prior uses
of such Property and all operations of the businesses of CalComp or any of the
CalComp Subsidiaries or any predecessor of CalComp or any of the CalComp
Subsidiaries comply and have at all times complied in all material respects with
all Environmental Laws and each of CalComp and the CalComp Subsidiaries is not
in

                                     - 28 -

 
violation of nor has it violated, in connection with the ownership, use,
maintenance or operation of such Property or the conduct of its business, any
Environmental Law.

          (iv) Except as set forth on Schedule 3.2(j), each of CalComp and the
CalComp Subsidiaries has all material permits, registrations, approvals and
licenses required by any governmental agency or Environmental Law.

          (v) To the best knowledge of CalComp, and except as set forth on
Schedule 3.2(j), there has been no spill, discharge, leak, emission, injection,
disposal, escape, dumping or release of any kind on, beneath or above such
Property or into the environment surrounding such Property of any Hazardous
Substances in violation of Environmental Laws or requiring Remedial Action.

          (vi) There are no claims, notices of violations, notice letters,
investigations, inquiries or other proceedings now pending or threatened by any
governmental entity or any foreign governmental entity or third party with
respect to the business or any in connection with any actual or alleged failure
to comply with any requirement of any Environmental Law.

          (k) Compliance with Laws.  Except as set forth on Schedule 3.2(k),
neither CalComp nor any CalComp Subsidiaries (i) is in violation of any law,
order or permit applicable to its business or (ii) has received any notification
or communication from any agency or federal, state or local government or any
regulatory authority or the staff thereof (a) asserting that either CalComp or
any of the CalComp Subsidiaries is not in compliance with any law or order; or
(b) threatening to revoke any material permits, or (c) requiring either CalComp
or any CalComp Subsidiaries (1) to enter into or consent to the issuance of a
cease and desist order, formal agreement, directive, commitment or memorandum of
understanding or (2) to adopt any Board resolution or similar undertaking which
restricts materially the conduct of its business, or in any manner relates to
its capital adequacy, its management, or the payment of dividends.

          (l) Technology.  CalComp owns, or is licensed or otherwise entitled to
use or (with respect to such of the following which pertain only to CalComp's
business as conducted or proposed to be conducted) can obtain on reasonable
terms rights to all patents, trademarks, tradenames, servicemarks, copyrights,
schematics, technology, know-how, computer software programs or applications in
tangible or intangible proprietary information or material that are used or
proposed to be used in the business of

                                     - 29 -

 
CalComp or any CalComp Subsidiaries as currently conducted or proposed to be
conducted by CalComp or any CalComp Subsidiaries (the "CalComp Intellectual
Property Rights"). Except as set forth on Schedule 3.2(l), no claims with
respect to the CalComp Intellectual Property Rights have been asserted, or to
the knowledge of CalComp, are threatened by any person nor does CalComp or any
CalComp Subsidiary know of any valid grounds for any bona fide claim (i) to the
effect that the manufacture, sale or use of any product or process as now used
or offered or proposed for use or sale by CalComp or any CalComp Subsidiary
infringes on any patents of any person, (ii) against the use by CalComp or any
CalComp Subsidiary of any trademarks, tradenames, trade secrets, copyrights,
technology, know-how, processes or computer software programs and applications
used in the business of CalComp and any CalComp Subsidiaries as currently
conducted or proposed to be conducted or (iii) challenging the ownership,
validity or effectiveness of any of the CalComp Intellectual Property Rights. To
CalComp's knowledge, all granted and issued patents, all registered trademarks,
and all copyrights that constitute part of the CalComp Intellectual Property
Rights are valid and existing. To CalComp's knowledge, there is no unauthorized
use, infringement or misappropriation of any of the CalComp Intellectual
Property Rights by any third party, employee or former employee.

     3.3  Representations and Warranties of Lockheed Martin.  In order to induce
          -------------------------------------------------                     
Summagraphics to enter into this Agreement and to consummate the transactions
contemplated hereby, Lockheed Martin represents and warrants to Summagraphics as
follows:

          (a) Organization and Standing.  Lockheed Martin is a corporation duly
organized, validly existing and in good standing under the laws of the State of
Maryland and, has all of the requisite corporate power and authority to
consummate the transactions contemplated by this Agreement.

          (b) Authority.  The execution and delivery of this Agreement and the
consummation of the transactions contemplated hereby have been duly and validly
authorized by the Board of Directors of Lockheed Martin and this Agreement is
the valid and binding obligation of Lockheed Martin.  Neither the execution and
delivery of this Agreement nor the consummation of the transactions contemplated
hereby, nor compliance by Lockheed Martin with any of the provisions hereof will
(i) conflict with or result in a breach of any provision of Lockheed Martin's
Charter or Bylaws, or result in a default or give rise to any right of
termination, cancellation or acceleration under any of the terms, conditions or
provisions of any material note, bond, mortgage, indenture, license, agreement
or

                                     - 30 -

 
other instrument, or result in a violation of any material agreement to which
Lockheed Martin is a party or by which it or any of its properties or assets may
be bound, or (ii) violate any order, writ, injunction, decree, statute, rule or
regulation applicable to Lockheed Martin or any of its properties or assets.  No
consent or approval by any governmental authority is required for the execution
and delivery by Lockheed Martin of this Agreement or the consummation of the
transactions to be consummated by Lockheed Martin hereunder, except for the
approval of all the applicable regulatory agencies and meeting of conditions
hereinafter set forth.

          (c) Litigation.  There are no actions, proceedings or investigations
pending or, to the best of Lockheed Martin's knowledge, threatened against
Lockheed Martin or any Lockheed Martin Subsidiary which, if adversely
determined, would have a Material Adverse Effect on the ability of Lockheed
Martin to consummate the transactions contemplated by this Agreement.  Neither
Lockheed Martin nor any of its Subsidiaries is subject to any agreement,
memorandum of understanding or similar arrangement with any regulatory authority
restricting its operations or requiring that certain actions be taken, and,
neither Lockheed Martin nor any of its Subsidiaries has received any
notification from any governmental or regulatory authority, or the staff
thereof, asserting that it is not in compliance with any statutes, regulations
or ordinances which such authority enforces, noncompliance with which could
reasonably be expected to have, individually or in the aggregate, a Material
Adverse Effect on the ability of Lockheed Martin to consummate the transactions
contemplated by this Agreement.

          (d) Ownership of CalComp Exchange Shares.  Lockheed Martin owns 100%
of the outstanding capital stock of CalComp of record and beneficially, and, as
of the Closing, free and clear of any Encumbrance.  Upon the Closing of the
Exchange and the delivery of the CalComp Exchange Shares to Summagraphics,
Summagraphics will acquire the entire legal and beneficial interest in and to
all of the CalComp Exchange Shares, free and clear of any Encumbrance other than
any Encumbrance which is a result of the terms of any agreement to which
Summagraphics is party, or any order, claim or other charge against
Summagraphics.

          (e) Investment Representation.  Lockheed Martin is aware that the
Summagraphics Exchange Shares are not registered under the Securities Act.
Lockheed Martin possesses such knowledge and experience in business matters that
it is capable of evaluating the merits and risks of its investments hereunder.
Lockheed Martin

                                     - 31 -

 
agrees not to sell, transfer, offer for sale, pledge, hypothecate or otherwise
dispose of the Summagraphics Exchange Shares, without registration under the
Securities Act, except pursuant to a valid exemption from registration under the
Securities Act.

          (f)    Tax Matters.

          (i) CalComp and each of the CalComp Subsidiaries have filed (or had
filed on their behalf), or will file or cause to be filed, all Tax Returns
required to be filed prior to the Closing, and have paid all Taxes required to
be paid in respect of the periods covered by such Tax Returns or, where payment
of such Taxes is not yet due, have established or will establish prior to the
Closing, an adequate reserve for the payment of all Taxes which are accruable
prior to the Closing.  CalComp and the CalComp Subsidiaries will not have any
material liability for any such Taxes in excess of the amounts so paid or the
reserve so established and CalComp and the CalComp Subsidiaries are not
delinquent in the payment of any material assessment of Taxes.  No material
deficiencies for any assessment of Taxes have been proposed, asserted or
assessed against CalComp or the CalComp Subsidiaries which would not be covered
by existing reserves and, as of the date of this Agreement, no requests for
waivers of the time to assess any such Taxes are pending.  CalComp, and to the
best of CalComp's knowledge, each of the CalComp Subsidiaries, has complied with
all IRS requirements regarding the certification of taxpayer identification
numbers of customers and backup withholding.


          (ii) There are no liens for any Taxes upon the assets of CalComp or
any CalComp Subsidiary, other than statutory liens for Taxes not yet due and
payable.

          (iii) Neither CalComp nor any CalComp Subsidiary is a party to any
agreement, contract or other arrangement that would result, separately or in the
aggregate, in the requirement to pay any "excess parachute payments" within the
meaning of Section 280G of the Code, or any gross-up in connection with such an
agreement, contract or arrangement.

          (g) Accuracy of Information Supplied.  The information which will be
provided in writing by Lockheed Martin specifically for inclusion in the Proxy
Statement pertaining to the transactions contemplated hereby, at the time such
information is provided will not contain any untrue statement of a material fact
or omit to state any material fact required to be stated therein in order to
make the statements not misleading, provided that information as of

                                     - 32 -

 
a later date shall be deemed to modify information of an earlier date. This
representation and warranty is being made solely for the benefit of
Summagraphics and is not intended, nor shall it be deemed to, create any rights
in any third party.

                                   ARTICLE IV

                    CONDUCT OF BUSINESS PRIOR TO THE CLOSING

     4.1  Conduct of the Business of Summagraphics and its Subsidiaries' Prior
          --------------------------------------------------------------------
to the Closing.  During the period from the date of this Agreement to the
- --------------                                                           
Closing and except as otherwise expressly provided in the last sentence of
Section 4.4, Summagraphics shall, and Summagraphics shall cause the
Summagraphics Subsidiaries to, conduct their respective operations according to
the ordinary and usual course of business consistent with current practices and
use their reasonable best efforts to maintain and preserve their business
organizations, employees and advantageous business relationships.
Notwithstanding the foregoing, Summagraphics shall not enter into any employee
benefit plan or arrangement with any employee, officer or director without the
prior consent of CalComp and Lockheed Martin.

     4.2  Forbearance.
          ----------- 

          (a) During the period from the date of this Agreement to the Closing
and except as contemplated by this Agreement (including with respect to Section
4.2(a)(v), (vi) and (viii) below the provisions of the last sentence of Section
4.4) and as set forth on Schedule 4.2, neither Summagraphics nor any
Summagraphics Subsidiaries shall without the prior written consent of CalComp
and Lockheed Martin:

               (i) make any changes to their respective Articles of
Incorporation or Bylaws;

          (ii) adjust, split, combine or reclassify Summagraphics Common Stock
or make, declare or pay any dividend or make any other distribution on, or
directly or indirectly redeem, purchase or otherwise acquire, any shares of
their capital stock or any securities or obligations convertible into or
exchangeable for any shares of their capital stock, or grant (or revise the
terms or conditions of any previous grant of) any stock options or stock
appreciation rights or give any person any right or warrant to acquire any
shares of their capital stock;



                                     - 33 -

 
          (iii) enter any contract or commitment or incur or agree to incur any
liability or make any capital expenditures, except in the normal course of
business;

          (iv) increase in any manner the compensation or fringe benefits of any
of their directors, officers, agents or employees or pay any pension or
retirement allowance not required by any existing Plan or agreement to any such
directors, officers, agents or employees or become a party to, amend or commit
itself to any pension, retirement, profit sharing, welfare benefit plan or
agreement or employment agreement with or for the benefit of any employee or
officer or other person other than payments consistent with past practices and
current incentive compensation plans and other increases consented to by
Lockheed Martin and CalComp in writing, which consent shall not be unreasonably
withheld;
 
          (v) sell, assign, lease or otherwise transfer or dispose of any
property or equipment except in the normal course of business;

          (vi) merge or consolidate or agree to merge or consolidate with or
into any other person;

          (vii) materially change the extent or character of its business
operations;

          (viii) dissolve, liquidate (completely or partially), acquire any
capital assets, or grant to any person a right or option to lease, acquire, or
purchase, any material amount of the assets of Summagraphics or any
Summagraphics Subsidiary (including any part thereof or any interest therein),
except in the ordinary course of business and consistent with past practice or
as expressly contemplated by this Agreement;

          (ix) issue any shares of its capital stock or any securities
convertible into or exercisable or exchangeable for capital stock;

          (x) incur any indebtedness for borrowings (except the Secured
Convertible Debenture, or issue any debt securities or any securities
convertible into debt securities or any options to purchase debt securities or
other rights in respect thereto or assume, indorse, or guarantee, or become a
surety, an accommodation party, or responsible in any other way for, an
obligation or indebtedness of another person;

                                     - 34 -

 
          (xi) discontinue or materially diminish any insurance coverage
applicable to its assets, properties, and business operations;


          (xii)  commit to a labor or employment contract of any kind
whatsoever, or any compensation obligation to any employee that is executory or
requires payment after the Closing Date, except as consented to in writing by
Lockheed Martin and CalComp, which consent shall not be unreasonably withheld;

          (xiii) mortgage, pledge or subject to any other lien any of its
assets;

          (xiv) cancel or compromise any legal right or claim of or debts owed
to Summagraphics or any Summagraphics Subsidiaries;

          (xv) engage in any speculative currency transactions; or
          
          (xvi)  agree to do, or acquiesce in, any of the foregoing acts.

          (b) During the period from the date of this Agreement to the Closing,
Summagraphics shall maintain itself as a corporation duly incorporated under the
laws of the State of Delaware and conduct and maintain its operations according
to its usual and ordinary course of business in accordance with past practice.

          (c) During the period from the date of this Agreement to the Closing,
Summagraphics shall consult with CalComp and Lockheed Martin with respect to
material business decisions affecting Summagraphics' business.

          (d) For purposes of seeking consent to any action to be taken in
accordance with the provisions of this Section 4.2, the parties acknowledge and
agree that any such request shall be in writing delivered to David B. Minnick at
Lockheed Martin Corporation (or such other person as is designated in writing by
Lockheed Martin).  Upon receipt of a written request from Summagraphics,
Lockheed Martin shall provide or withhold its consent to such request as soon as
reasonably practicable.

     4.3  No Solicitation.  Summagraphics acknowledges that Lockheed Martin will
          ---------------                                                       
devote substantial time and incur substantial out-of-pocket expenses in
connection with the preparation and negotiation of this Agreement and the
consummation of the

                                     - 35 -

 
transactions contemplated hereby. Unless and until the sooner of (i) Lockheed
Martin notifies Summagraphics that it no longer wishes to pursue the
Transaction, (ii) this Agreement shall have been terminated pursuant to its
terms or (iii) June 15, 1996, neither Summagraphics nor any of its subsidiaries
nor any of their executive officers, directors, agents (including, without
limitation, Broadview Associates, L.P. or Needham & Company, Inc.) or affiliates
of any of the foregoing, shall, directly or indirectly, encourage, solicit or
initiate discussions or negotiations with any person (other than Lockheed
Martin) concerning any Acquisition Proposal (as hereinafter defined) or
disclose, directly or indirectly, to any person in connection with an
Acquisition Proposal any information not customarily disclosed to the public
concerning Summagraphics or any of the Summagraphics' Subsidiaries, afford to
any other person access to the properties, books or records of Summagraphics or
any of the Summagraphics Subsidiaries in connection with an Acquisition Proposal
or otherwise assist any person preparing to make or who has made such an
Acquisition Proposal, or enter into any agreement with any third party providing
for a business combination transaction, equity investment or a sale of all or
any significant amount of assets, except in a situation in which a majority of
the full Board of Directors of Summagraphics has determined in good faith, upon
advice of counsel, that such Board has a fiduciary duty to consider and respond
to a bona fide Acquisition Proposal by a third party (which Acquisition Proposal
was not directly or indirectly solicited by Summagraphics or the Summagraphics
Subsidiaries or any of their respective officers, directors, representatives,
agents or affiliates in violation of this Agreement) and provides written notice
of its intention to consider such Acquisition Proposal. Summagraphics will
promptly communicate to Lockheed Martin the identity of the offeror and the
terms of any Acquisition Proposal which it may receive in respect to any of the
foregoing transactions.

     4.4  Termination Fee.  In the event that (i) the Closing does not occur
          ---------------                                                   
because of a breach of this Agreement by Summagraphics and within twelve months
thereafter Summagraphics enters into an agreement with respect to an Acquisition
Proposal or the consummation of the transactions contemplated by any Acquisition
Proposal occurs or (ii) Summagraphics breaches the provisions of Section 4.3,
Summagraphics (or the survivor of any transaction contemplated by the
Acquisition Proposal, which shall include any purchaser of a substantial portion
of the assets of Summagraphics or any Summagraphics Subsidiary) shall
immediately pay to Lockheed Martin by wire transfer of immediately available
funds the sum of $1,250,000 (the "Termination Fee").  For purposes of this

                                     - 36 -

 
Agreement, "Acquisition Proposal" shall mean any third party proposal concerning
any merger, share exchange, consolidation, sale of any substantial portion of
the assets of Summagraphics and the Summagraphics Subsidiaries, tender offer,
sale of control or similar transaction involving Summagraphics or any
Summagraphics Subsidiaries.  The term "Acquisition Proposal" shall not include,
among other things, any third party proposal to acquire Summagraphics' CAD
Warehouse business or Summajet or Summachrome product lines or to secure license
rights to such products; provided, however, Summagraphics shall obtain written
approval from Lockheed Martin prior to entering into any agreement in respect to
any of the foregoing, which approval shall not be unreasonably withheld.

     4.5  Compliance with Tax-Free Provisions.  Summagraphics shall not take any
          -----------------------------------                                   
action prior to or after the Closing which would disqualify the Exchange (and
the other transactions contemplated hereby) as a tax free reorganization under
Section 368(a)(1)(B) of the Internal Revenue Code of 1986, as amended.

     4.6  Access and Information; Cooperation.  Summagraphics and the
          -----------------------------------                        
Summagraphics Subsidiaries will permit reasonable access to Lockheed Martin and
CalComp and their respective representatives, during normal business hours to
verify the accuracy from time to time of the representations and warranties
contained herein. Such investigation may include an examination of all of
Summagraphics' business affairs, contracts, personnel records, premise files,
accounts receivable and accounts payable, tax returns, agreements, schedule of
assets owned, and all other items deemed necessary by Lockheed Martin to make
such examination thereof and to conduct such other investigation as they deem
appropriate to verify the representations and warranties of Summagraphics
contained herein. Summagraphics and CalComp will each give to the officers,
accountants, counsel and authorized representatives of the other Party access to
its properties, books and records and those of its subsidiaries (including its
audit work papers) and will furnish the other Party with such additional
financial and operating data and other information as to its business and
properties and those of its subsidiaries as the other Party may from time to
time reasonably request. In addition, each shall promptly deliver to the other
each internally prepared monthly balance sheet from November 30, 1995 in the
case of Summagraphics and December 31, 1995 in the case of CalComp, if any,
through Closing and all other internally prepared financial information prepared
since November 30, 1995 or December 31, 1995, as the case may be. The Parties
will cooperate with each other in the preparation of any documents or other
materials which may be required in connection

                                     - 37 -

 
with the preparation of the Proxy Statement as filed with the SEC or
in connection with any other documents or materials required by any governmental
agency, stock exchange or association of securities dealers.  CalComp will
cooperate with and furnish such information to, and cause its directors and
officers and those of its subsidiaries to cooperate with and furnish such
information to, Summagraphics as Summagraphics may reasonably request in
connection with the preparation of the Proxy Statement for the special meeting
of the stockholders of Summagraphics to consider the transactions contemplated
hereby.

     4.7  Confidentiality.  Each of the Parties shall cause its advisers and
          ---------------                                                   
agents to maintain the confidentiality of all confidential information furnished
to it by the other party concerning its and its Subsidiaries' businesses,
operations, and financial positions, and shall not use such information for any
purpose except in furtherance of the transactions contemplated by this
Agreement. If this Agreement is terminated prior to the Closing, each Party
shall promptly return all documents and copies thereof, and return or destroy
all work papers containing confidential information received from the other
Party. In the event that any Party violates any of the terms of this paragraph,
they agree that the Party who is not in violation would have an inadequate
remedy at law for such violation and may, therefore, seek an injunction without
the necessity of bond, to prevent or halt any violation hereof and the parties
hereto agree not to raise any defense that the Party who is not in violation of
this paragraph has an adequate remedy at law. The Parties further acknowledge
and agree that in the event of a violation of the terms and conditions of this
paragraph that the party who is not in violation shall have any and all remedies
available at law or equity and shall not be limited to the remedy of injunctive
relief. The confidentiality provisions of this Section 4.7 are in addition to
and shall not be deemed to supersede the agreements contained in (i) the letter,
dated October 12, 1995, from Broadview Associates, L.P. to Lockheed Martin and
(ii) the letter agreement, dated December 20, 1995, between Lockheed Martin
Corporation and Summagraphics (the "Confidentiality Agreements"). In addition,
CalComp agrees that, in the event that this Agreement is terminated for any
reason prior to Closing, CalComp shall not for a period of one year from the
date hereof, directly or indirectly, recruit any non-clerical employee of
Summagraphics with whom CalComp has had contact in connection with CalComp's
investigation of Summagraphics from the date hereof to the Closing; provided
however, that the foregoing restriction shall not preclude CalComp or Lockheed
Martin from employing any such employee who seeks employment with CalComp or
Lockheed Martin in response to a general advertisement or other

                                     - 38 -

 
similar method and not in response to any direct solicitation efforts made by
CalComp or Lockheed Martin.  Any provisions of this Section 4.7 shall survive
the Closing or the termination of this Agreement.

     4.8  Public Announcements.  The Parties will consult with each other before
          --------------------                                                  
issuing any press release relating to this Agreement or the transactions
contemplated herein and shall not issue any such press release without the prior
written consent of the other Party, except as may be required by law or by
obligations pursuant to any listing agreement with any national securities
exchange.

     4.9  Consents.
          -------- 

          (a) From the date of this Agreement to the Closing, Summagraphics will
use its reasonable best efforts (which efforts shall not include the payment of
any money to any third party without the prior consent of Lockheed Martin, other
than ordinary filing fees) to obtain the written consents or approvals of all
third parties whose consent or approval is required with regard to the
transactions contemplated to be performed by Summagraphics by the terms of this
Agreement, whether under the terms of any lease, mortgage, indenture or other
agreement to which Summagraphics or any of the Summagraphics Subsidiaries is a
party or by which any of their assets is bound or otherwise.

          (b) From the date of this Agreement to the Closing, each of Lockheed
Martin and CalComp will use their respective reasonable best efforts (which
efforts shall not include the payment of any money to any third party, other
than ordinary filing fees) to obtain the written consents or approvals of all
third parties whose consent or approval is required with regard to the
transactions contemplated to be performed by Lockheed Martin or CalComp, as the
case may be, by the terms of this Agreement, whether under the terms of any
lease, mortgage, indenture or other agreement to which Lockheed Martin or
CalComp or any of their respective Subsidiaries is a party or by which any of
their assets is bound or otherwise.

          (c) The Parties agree to reasonably cooperate with each other in
connection with obtaining the consents contemplated by Section 4.9.

     4.10  Meeting of Summagraphics Stockholders.  Summagraphics will duly call
           -------------------------------------                               
and within the time set forth in its Bylaws will convene a special meeting of
its stockholders to act upon the transactions contemplated hereby, the Board of
Directors of Summagraphics (subject to Section 2.1) will recommend approval of

                                     - 39 -

 
this Agreement and the Fourth Amended and Restated Articles of Incorporation to
its stockholders, and will use its reasonable best efforts to obtain a favorable
vote thereon. The calling and holding of such meetings and all transactions,
documents and information related thereto will be in compliance with all
applicable laws (including, without limitation, applicable securities laws). The
Proxy Statement for the stockholders' meeting of Summagraphics will be in form
and content reasonably satisfactory to Lockheed Martin.

                                   ARTICLE V

                     ADDITIONAL COVENANTS OF SUMMAGRAPHICS

     5.1  Issuance of Stock.  Summagraphics will issue and deliver or cause to
          -----------------                                                   
be delivered the Summagraphics Exchange Shares to Lockheed Martin (or its
designee) as called for by Paragraph 1.1 of this Agreement.

     5.2  Intercompany Agreements.  At the Closing, Summagraphics shall execute
          -----------------------                                              
and deliver to Lockheed Martin each of the following documents (collectively,
the "Intercompany Agreements"):

          (a) an intercompany services agreement in the form attached hereto as
Exhibit B (the "Services Agreement");

          (b) a cash management agreement in the form attached hereto as Exhibit
C (the "Cash Management Agreement");

          (c) a tax sharing agreement in the form attached hereto as Exhibit D
(the "Tax Sharing Agreement");

          (d) a revolving credit agreement in the form attached hereto as
Exhibit E (the "Revolving Credit Agreement");

          (e) a registration rights agreement in the form attached hereto as
Exhibit F (the "Registration Rights Agreement"); and

          (f) a corporate agreement in the form attached hereto as Exhibit G
(the "Corporate Agreement").

     5.3  Amendment and Restatement of Articles of Incorporation.  Prior to
          ------------------------------------------------------           
Closing, Summagraphics shall take all actions necessary or appropriate
(including approval of its stockholders) to cause to be filed with the Secretary
of State of the State of Delaware an amendment and restatement to its Articles
of Incorporation in the

                                     - 40 -

 
form attached as Exhibit H (the "Fourth Amended and Restated Articles of
Incorporation") pursuant to which:

          (a) Summagraphics shall change its name to CalComp Inc.;

          (b) Summagraphics shall agree to the allocation of business
opportunities by and between it and Lockheed Martin set forth therein; and

          (c) Summagraphics shall increase the number of authorized shares of
capital stock to 60,000,000 shares of Common Stock and 5,000,000 shares of
Preferred Stock.

     5.4  Preparation of Proxy Statement.  In accordance with the provisions of
          ------------------------------                                       
Section 2.1, Summagraphics shall prepare, file in definitive form and deliver to
each of its stockholders the Proxy Statement.

     5.5  Additional Listing Application.  At or prior to Closing, Summagraphics
          ------------------------------                                        
shall take all action necessary or appropriate to cause the Summagraphics
Exchange Shares to be listed for trading on the NASDAQ Interdealer Quotations
System.

     5.6  Filing of Form 10-C.  Within 10 days of Closing, Summagraphics shall
          -------------------                                                 
prepare and have filed with the SEC its report on Form 10-C-Report By Issuer of
Securities Quoted on NASDAQ Interdealer Quotations System in respect of the
Summagraphics Exchange Shares.

     5.7  Hart-Scott-Rodino.  As soon as practicable following the execution of
          -----------------                                                    
this Agreement and no later than 10 days after the execution of this Agreement,
Summagraphics shall make its filing of a Notification and Report Form pursuant
to, and shall thereafter promptly make any required submissions under the HSR
Act with respect to the transactions contemplated by this Agreement.  In
addition, Summagraphics shall cooperate with Lockheed Martin in connection with
Lockheed Martin's filing under the HSR Act in respect of the transactions
contemplated by this Agreement.

     5.8  Stock Option Plan.  Summagraphics shall use its reasonable best
          -----------------                                              
efforts to cause the stock option plan in the form attached hereto as Exhibit I
(the "Stock Option Plan") to be approved by its shareholders.

                                     - 41 -

 
                                   ARTICLE VI

                    COVENANTS OF CALCOMP AND LOCKHEED MARTIN

     6.1  Transfer of CalComp Exchange Shares.  At the Closing, Lockheed Martin
          -----------------------------------                                  
will, or will cause its subsidiary to, transfer and deliver the CalComp Exchange
Shares to Summagraphics as called for by Section 1.1 of this Agreement.

     6.2  Intercompany Agreements.  At the Closing, Lockheed Martin shall
          -----------------------                                        
execute and deliver to Summagraphics each of the Intercompany Agreements.

     6.3  Preparation of Proxy Statement.  Each of Lockheed Martin and CalComp
          ------------------------------                                      
shall use reasonable efforts to cooperate with Summagraphics in the preparation
of the Proxy Statement.

     6.4  Hart-Scott-Rodino.  As soon as practicable following the execution of
          -----------------                                                    
this Agreement and no later than 10 days after the execution of the Agreement,
Lockheed Martin shall make its filing of a Notification and Report Form pursuant
to, and shall thereafter promptly make any required submissions under, the HSR
Act with respect to the transactions contemplated by this Agreement. In
addition, Lockheed Martin shall cooperate with Summagraphics in connection with
the preparation and filing of a Notification and Report Form in respect of the
transactions contemplated by this Agreement under the HSR Act by Summagraphics.

     6.5  CalComp Financial Statements.  As soon as practicable following the
          ----------------------------                                       
execution of this Agreement but in no event after March 25, 1996, CalComp shall
deliver to Summagraphics for inclusion in the Proxy Statement the following
financial statements, audited, with an unqualified opinion by Ernst & Young LLP,
CalComp's independent auditors; the consolidated balance sheet of CalComp for
each of the fiscal years ended December 31, 1995 and 1994, the consolidated
income statement of CalComp for each of the years in the three year period ended
December 31, 1995, the statement of shareholders' equity for each of the years
ended in the three year period ended December 31, 1995 and the consolidated
statement of cash flow of CalComp for each of the years in the three year period
ended December 31, 1995 (collectively, the "CalComp Financial Statements").  The
CalComp Financial Statements shall be prepared on a basis which treats the
disposition of AGT as if it had occurred prior to the CalComp Financial
Statements.

     6.6  Pre-Closing Assistance.  Lockheed Martin acknowledges that changes may
          ----------------------                                                
occur in the business of Summagraphics and the

                                     - 42 -

 
Summagraphics Subsidiaries resulting from employee resignations and the
deterioration or termination of vendor or customer relations which are a direct
result of the announcement or of the transactions contemplated by this Agreement
and Lockheed Martin will use reasonable efforts to work with Summagraphics to
remedy such occurrences, it being understood that if such occurrences (together
with all other events, changes or occurrences) result in a Material Adverse
Effect despite Lockheed Martin's efforts, Lockheed Martin would be entitled
pursuant to Section 10.2(b) to terminate this Agreement.

                                  ARTICLE VII

                       CONDITIONS PRECEDENT TO CALCOMP'S
                  AND LOCKHEED MARTIN'S OBLIGATIONS HEREUNDER

     Unless waived in writing by Lockheed Martin, in its sole discretion, all
obligations of CalComp or Lockheed Martin, as the case may be, hereunder to
effect the Exchange shall be subject to the fulfillment prior to or at the
Closing of the following conditions:

     7.1  Representations, Warranties, Covenants.  The representations and
          --------------------------------------                          
warranties of Summagraphics herein contained shall be true in all material
respects as of the Closing, shall be deemed made again at and as of the Closing
and shall be true in all material respects as if so made again; Summagraphics
shall have performed all of the obligations and complied with all of the
covenants required by this Agreement to be performed  or complied with by it in
all material respects on or prior to the Closing Date and Lockheed Martin shall
receive from Summagraphics officers' certificates in such detail as Lockheed
Martin may reasonably request dated the Closing Date and signed by the chief
executive officer, president or secretary of Summagraphics to the foregoing
effect.

     7.2  No Adverse Changes.  There shall not have been any material adverse
          ------------------                                                 
changes in the financial position, results of operations, assets, liabilities or
business of Summagraphics and the Summagraphics Subsidiaries, taken as a whole,
from November 30, 1995, the date of the Summagraphics Financial Statements
referred to in Paragraph 3.1(e) above, to the Closing Date, which changes,
individually or in the aggregate, have or could reasonably be expected to have a
Material Adverse Effect.

     7.3  Due Diligence Audit of Summagraphics and its Subsidiaries.  The tax
          ---------------------------------------------------------          
portion of the due diligence audit of

                                     - 43 -

 
Summagraphics and its Subsidiaries conducted pursuant to Paragraph 4.6 shall
have confirmed the accuracy of the representations and warranties set forth in
Section 3.1(h) and 3.1(n) and the final review of accountant's work papers
relating to Summagraphics' Belgium operation shall be reasonably satisfactory to
Lockheed Martin.

     7.4  Legal Opinion.  Lockheed Martin shall have received a written opinion,
          -------------                                                         
dated as of the Closing Date, from Hughes & Luce, L.P., counsel to
Summagraphics, in form reasonably satisfactory to Lockheed Martin, which shall
cover matters customary in transactions of this nature.

     7.5  No Adverse Proceedings.  There shall be no order restraining or
          ----------------------                                         
prohibiting the transaction contemplated hereby and no action or proceeding
against any of the Parties or their respective Subsidiaries in respect of the
consummation of the transactions contemplated by this Agreement shall have been
instituted or threatened or any investigations or inquiries undertaken that, in
the reasonable judgment of the affected party, could result in substantial
damages or as a result of which the affected party could be deprived of any of
the material benefit of the contemplated transactions.

     7.6  Intercompany Agreements.  Summagraphics shall have executed and
          -----------------------                                        
delivered to Lockheed Martin each of the Intercompany Agreements referred to in
Section 5.2.

     7.7  Approval by Stockholders of the Agreement, the Stock Option Plan and
          --------------------------------------------------------------------
Amendment and Restatement of Summagraphics' Articles of Incorporation.  This
- ---------------------------------------------------------------------       
Agreement, the Fourth Amended and Restated Articles of Incorporation and the
Stock Option Plan shall have been submitted to the stockholders of Summagraphics
at a special meeting of stockholders duly called and held and each of the
transactions contemplated by this Agreement, the Fourth Amended and Restated
Articles of Incorporation and the Stock Option Plan shall have been approved, in
accordance with the provisions of Sections 242 and 245 of the General
Corporation Law of the State of Delaware (the "DGCL") and the Certificate of
Incorporation and Bylaws of Summagraphics, by an affirmative vote of the holders
of at least a majority of all the outstanding shares of Summagraphics Common
Stock entitled to vote and, with respect to the Exchange and the Stock Option
Plan by the affirmative vote of the holders of a majority of the shares present
and entitled to vote at the meeting. Summagraphics shall have duly authorized
the filing of, and shall have filed and caused to be accepted of record by the
Secretary of

                                     - 44 -

 
State of the State of Delaware, the Fourth Amended and Restated Articles of
Incorporation.

     7.8  Additional Listing Application.  Summagraphics shall have caused the
          ------------------------------                                      
Summagraphics Exchange Shares to be listed on the NASDAQ Interdealer Quotation
System.

     7.9  Secretary's Certificate.  At the Closing, Summagraphics shall cause to
          -----------------------                                               
be delivered to Lockheed Martin, a secretary's certificate in a form reasonably
satisfactory to Lockheed Martin.

     7.10  Compliance With Laws/Government Approvals.  All applicable
           -----------------------------------------                 
securities, antitrust and other laws shall have been complied with in connection
with the transactions contemplated hereby.  All authorizations, consents, orders
or approvals of, or declarations or filings with, or expiration of waiting
periods imposed by, any governmental authorities necessary for the consummation
of the transactions contemplated by this Agreement, including, but not limited
to, such requirements under applicable state securities laws, the Securities
Exchange Act of 1934, as amended (the "Exchange Act") and the HSR Act, shall
have been filed, occurred or been obtained.  All other material consents of
third parties shall have been obtained.

     7.11  Backlog.  The representations and warranties set forth in Section
           -------                                                          
3.1(bb) shall be true and correct in all respects as of Closing.  At the
Closing, Summagraphics shall have caused to be delivered to Lockheed Martin, a
certificate from Michael S. Bennett and Dave Osowski in such detail as Lockheed
Martin may reasonably request, dated the Closing Date, to such effect together
with copies of purchase orders evidencing such Backlog.

                                  ARTICLE VIII

          CONDITIONS PRECEDENT TO SUMMAGRAPHICS' OBLIGATIONS HEREUNDER

     Unless waived in writing by Summagraphics, in its sole discretion, all
obligations of Summagraphics hereunder to effect the Exchange shall be subject
to the fulfillment prior to or at the Closing of the following conditions:

     8.1  Representations, Warranties, Covenants.  The representations and
          --------------------------------------                          
warranties of each of CalComp and Lockheed Martin herein contained shall be true
in all material respects as of the Closing Date, shall be deemed made again at
and as of the Closing Date and shall be true in all material respects as if so
made again.  Each of CalComp and Lockheed Martin shall have

                                     - 45 -

 
performed all obligations and complied with all covenants required by this
Agreement to be performed or complied with by it on or prior to the Closing Date
in all material respects and Summagraphics shall have received from Lockheed
Martin an officer's certificate in such detail as Summagraphics may reasonably
request dated the Closing Date and signed by its president, any vice president
or other authorized signatory or secretary to the foregoing effect.

     8.2  No Adverse Proceedings or Events.  There shall be no order restraining
          --------------------------------                                      
or prohibiting the transactions contemplated hereby and no action or proceeding
against any of the Parties or their respective Subsidiaries in respect of the
consummation of the transactions contemplated by this Agreement shall have been
instituted or threatened or any investigations or inquiries undertaken that in
the reasonable judgment of Summagraphics, could result in substantial damages or
as a result of which Summagraphics could be deprived of any of the material
benefits of the transactions contemplated by this Agreement.

     8.3  No Adverse Changes.  There shall not have been any material adverse
          ------------------                                                 
change in the financial position, results of operations, assets, liabilities or
business of CalComp and the CalComp Subsidiaries, taken as a whole, from
December 31, 1995, to the Closing Date, which changes, individually or in the
aggregate, have or constitute a Material Adverse Effect.

     8.4  Legal Opinion.  Summagraphics shall have received a written opinion,
          -------------                                                       
dated as of the Closing Date, of in-house counsel to Lockheed Martin, in form
reasonably satisfactory to Summagraphics, which shall cover matters customary in
transactions of this nature.

     8.5  Fairness Opinion.  The fairness opinion delivered to the Board of
          ----------------                                                 
Directors of Summagraphics by Needham & Company, Inc. in accordance with the
provisions of Section 3.1(w) shall not have been rescinded.

     8.6  Stockholder Approval.  The transactions contemplated by this Agreement
          --------------------                                                  
and the Fourth Amended and Restated Articles of Incorporation shall have been
approved and adopted by the affirmative vote of the holders of at least a
majority of the outstanding shares of Summagraphics Common Stock.

     8.7  Secretary's Certificate.  At the Closing, each of CalComp and Lockheed
          -----------------------                                               
Martin shall cause to be delivered to Summagraphics,

                                     - 46 -

 
a secretary's certificate in a form reasonably satisfactory to Summagraphics.

     8.8  Intercompany Agreements.  Lockheed Martin shall have executed and
          -----------------------                                          
delivered to Summagraphics each of the Intercompany Agreements referred to in
Section 5.2.  Sufficient funds shall have been made available to Summagraphics
pursuant to the Revolving Credit Agreement at the Closing to allow Summagraphics
to repay in full its indebtedness to Silicon Valley Bank and Heller Financial.

                                   ARTICLE IX

                             ADDITIONAL AGREEMENTS

     9.1  Update Disclosure; Breaches.  From and after the date hereof until the
          ---------------------------                                           
Closing, each Party shall promptly notify each other Party by written update of
(a) the occurrence, non-occurrence, or any event the occurrence, or non-
occurrence, of which would be likely to cause any representation or warranty
contained in this Agreement to be untrue or inaccurate, (b) any failure of a
Party to comply with or satisfy any covenant, condition or agreement to be
complied with or satisfied by it pursuant to this Agreement, and (c) any other
matter which may occur from and after the date of this Agreement which, if
existing on the date hereof, would have been required to be described herein;
provided, however, that the delivery of any such notice shall not cure any
breach of any representation or warranty requiring disclosure of such matter
prior to or on the date of this Agreement or otherwise limit or affect the
remedies available hereunder to the Party receiving such notice under this
Agreement.

     9.2  Tax Returns.  The Exchange shall be reported as a "reorganization"
          -----------                                                       
within the meaning of Section 368(a)(i)(B) of the Code in all federal and, to
the extent permitted, all state and local tax returns filed after the Closing.
Notwithstanding any other provisions of this Agreement, the obligations set
forth in this Section 9.2 shall survive the Closing.

     9.3  Best Efforts and Further Assurances.  Each of the Parties to this
          -----------------------------------                              
Agreement shall use its best reasonable efforts to effectuate the transactions
contemplated hereby and to fulfill and cause to be fulfilled the conditions to
the Closing under this Agreement.  Each party hereto, at the reasonable request
of another party hereto, shall execute and deliver such other instruments and do
and perform such other acts and things as may be necessary or desirable for
affecting completely the consummation of this Agreement and the transactions
contemplated hereby.  If, at any

                                     - 47 -

 
time after the Closing, any such further action is necessary or desirable to
carry out the purposes of this Agreement and to vest Lockheed Martin with full
right, title and possession of the Summagraphics Exchange Shares or
Summagraphics with full right, title and possession of the CalComp Exchange
Shares, the officers and directors of each of Lockheed Martin and Summagraphics
shall take all such lawful and necessary action.

     9.4  Payoff of Outstanding Indebtedness.  At the Closing, Summagraphics
          ----------------------------------                                
shall pay, discharge and satisfy all outstanding indebtedness to Silicon Valley
Bank and Heller Financial described on Schedule 3.1(aa) and shall deliver to
Lockheed Martin evidence satisfactory to Lockheed Martin that  such banks or
financial institutions have released all Encumbrances which such bank or
financial institutions then hold against the properties or assets of
Summagraphics or any Summagraphics Subsidiaries.  The Parties acknowledge and
agree that Summagraphics shall be entitled to borrow funds from Lockheed Martin
under the Revolving Credit Agreement at Closing to pay off such amounts.

     9.5  Directors and Officers Liability Insurance.  For a period of six years
          ------------------------------------------                            
after the Closing, Lockheed Martin shall use reasonable efforts to cause to be
maintained in effect the current policies of directors and officers liability
insurance maintained by Summagraphics (provided that Lockheed Martin may
substitute therefore policies with reputable and financially sound carriers of
at least the same coverage in amounts containing terms and conditions which are
no less advantageous) with respect to claims arising from or related to facts or
events which occurred at or before the Closing; provided, that Lockheed Martin
shall not be obligated to make premium payments for such insurance to the extent
such premiums exceed 150% of the premiums paid as of the date hereof by
Summagraphics for such insurance (the "Maximum Amount"). If the amount of the
annual premiums necessary to maintain or procure such insurance coverage exceeds
the Maximum Amount, Lockheed Martin and Summagraphics shall maintain the most
advantageous policies of directors, and officers' insurance obtainable for an
annual premium equal to the Maximum Amount.


     9.6  CalComp Taxes.
          ------------- 

          (a) Lockheed Martin shall reimburse or pay and assume liability for
and indemnify and hold harmless Summagraphics and CalComp against (i) any
Federal or state income or franchise taxes based on income, including any
interest, penalties or other additions to tax with respect to such amounts,
payable by or on

                                     - 48 -

 
behalf of CalComp or any of the CalComp Subsidiaries for any period ending on or
prior to December 31, 1995 (except in each case to the extent that such
liability is properly reflected as an accrued liability in a balance sheet for
such company as at the close of business on December 31, 1995), and (ii) any
deficiencies in any taxes described in (i) above payable by or on behalf of
CalComp or any of the CalComp Subsidiaries with respect to any period ending on
or prior to December 31, 1995.

          (b) Lockheed Martin shall be entitled to all refunds of any taxes
described in (a)(i) above, together with any interest thereon, with respect to
CalComp or any of the CalComp Subsidiaries for any period ending on or prior to
December 31, 1995, and Summagraphics shall pay or cause to be paid to Lockheed
Martin any such refunds received.

                                   ARTICLE X

                      TERMINATION, AMENDMENT, SURVIVAL OF
                       REPRESENTATIONS AND MISCELLANEOUS

     10.1  Amendment.  This Agreement may not be amended at any time except in
           ---------                                                          
writing signed by each of the Parties.

     10.2  Termination.  Notwithstanding any other provision to the contrary of
           -----------                                                         
this Agreement, and notwithstanding the approval of this Agreement by the
stockholders of Summagraphics, this Agreement and the transactions contemplated
hereby may be terminated and the Exchange abandoned (without any obligation
(other than the payment of the fee contemplated by Section 4.4 in the event that
Summagraphics terminates this Agreement) by Lockheed Martin or Summagraphics to
renegotiate the Agreement) at any time prior to the Effective Date:

          (a) By mutual consent of Summagraphics and Lockheed Martin; or


          (b) By Summagraphics or Lockheed Martin (provided that the terminating
Party is not then in material breach of any representation, warranty, covenant,
or other agreement contained in this Agreement) in the event of a material
breach by the other Party of any representation, warranty, covenant or other
agreement contained in this Agreement which cannot be or has not been cured
within thirty (30) days after the giving of written notice to the breaching
Party of such breach; provided, however, that, for purposes of this Section
10.2(b), a material breach of a representation or warranty shall be deemed to
exist only if, when

                                     - 49 -

 
aggregated with all other such breaches, the breach has or constitutes a
Material Adverse Effect; or

          (c) By either Party hereto if the Federal Trade Commission or the
Department of Justice, as the case may be, denied approval of the Exchange under
the HSR Act and the time period for all appeals or requests for reconsideration
has run;

          (d) By either Summagraphics or Lockheed Martin in the event the
Closing has not occurred on or before June 15, 1996 or such later date as may be
established pursuant to Section 1.2, provided the failure to consummate the
Exchange is not caused by or does not result in any breach of the Agreement by
the Party electing to terminate; or

          (e) By the Board of Directors of either Summagraphics or Lockheed
Martin (provided that the terminating Party is not then in material breach of
any representation, warranty, covenant or other agreement contained in this
Agreement) in the event that any of the conditions precedent to the obligations
of such Party to consummate the Exchange cannot be satisfied or fulfilled on or
before June 15, 1996 or such later date as may be established pursuant to
Section 1.2;

          (f) By Summagraphics, if Lockheed Martin has not on or before the date
the Proxy Statement is first mailed to stockholders of Summagraphics delivered
written notice to Summagraphics that the conditions set forth in Section 7.3 has
been waived or satisfied;

          (g) By Summagraphics if the holders of more than fifty percent of the
outstanding shares of Summagraphics Common Stock fail to vote in favor of the
transactions contemplated by this Agreement or the Fourth Amended and Restated
Articles of Incorporation;

          (h) By the Board of Directors of Summagraphics if Summagraphics
receives an Acquisition Proposal which the Board of Directors of Summagraphics
determines in good faith in accordance with Paragraph 4.3 that it must consider,
and which Acquisition Proposal a majority of the full Board of Directors of
Summagraphics further determines to approve and to recommend to the stockholders
of Summagraphics for approval; provided however that, in that event,
Summagraphics pays to Lockheed Martin the fee contemplated by Section 4.4.

In the event of the termination of this Agreement and the abandonment of the
transactions contemplated by this Agreement

                                     - 50 -

 
pursuant to this Paragraph 10.2, other than as otherwise expressly provided
herein, this Agreement shall become void and have no effect, without any
liability on the part of either Party or its directors, officers or
stockholders.  Notwithstanding the foregoing, nothing contained in this
Paragraph 10.2 shall relieve either Party from liability for any breach of this
Agreement.

     10.3  Survival of Representations and Covenants.  Except for those
           -----------------------------------------                   
provisions of this Agreement that by their terms survive the Closing, the
respective warranties, representations, obligations and agreements of the
Parties hereto shall not survive the Closing.

     10.4  Expenses.  Except as provided in Section 4.4 each party will pay its
           --------                                                            
own fees and expenses, including the fees and expenses of accountants,
attorneys, investment advisors and other professionals, incurred in connection
with the negotiation of this Agreement and the consummation of the transactions
contemplated hereby, provided that CalComp shall pay (i) the filing fee
associated with the filings of the Parties under the HSR Act and (ii) the filing
fee of the SEC associated with the Proxy Statement.  Notwithstanding the
foregoing, in the event that either Party breaches this Agreement and this
Agreement is thereafter terminated, that Party shall pay the reasonable fees and
expenses of third-party consultants, accountants and attorneys that are actually
incurred (including fees and expenses incurred by Summagraphics relating to the
fairness opinion contemplated by Section 3.1(w) and the filing fees to be paid
by CalComp pursuant to the proviso contained in the preceding sentence) by the
                           -------                                            
non-terminating party in connection with the preparation and delivery of this
Agreement and the consummation of the transactions contemplated hereby.
Notwithstanding the foregoing, in the event that Lockheed Martin terminates this
Agreement in breach of the terms hereof or Summagraphics terminates this
Agreement pursuant to Section 10.2(b), Lockheed Martin agrees to pay within five
days of receipt of a reasonably detailed statement from Summagraphics, the
reasonable fees and expenses of third party consultants, accountants and
attorneys which are actually incurred by Summagraphics in connection with the
preparation and delivery of this Agreement and the consummation of the
transactions contemplated hereby.  The obligations of the Parties under this
Section will survive any termination of this Agreement pursuant to Section 10.2.

     10.5  Notices.  All notices, requests, demands and other communications
           -------                                                          
under or connected with this Agreement shall be in writing and (a) if to
Summagraphics shall be addressed to 8500 Cameron Road, Austin, Texas  78754,
Attention:  Robert B. Sims,

                                     - 51 -

 
Esquire, General Counsel, with copies to its counsel, Hughes & Luce, L.L.P.,
1717 Main Street, Suite 2800, Dallas, Texas 75201, Attention: Michael W.
Tankersley, Esquire, and (b) if to Lockheed Martin shall be addressed to 6801
Rockledge Drive, Bethesda, Maryland 20817, Attention: Stephen M. Piper, Esquire,
Assistant General Counsel, with a copy to Lockheed Martin Information &
Technology Services, 6801 Rockledge Drive, Bethesda, Maryland 20817, Attention:
Director of Finance and (c) if to CalComp shall be addressed to 2411 West
LaPalma Avenue, Anaheim, California 92801, Attention: General Counsel.

     10.6  Entire Agreement in Effect.  This Agreement, including the Exhibits
           --------------------------                                         
and Schedules hereto (together with the Confidentiality Agreements), is intended
by the Parties to and does constitute the entire agreement of the Parties with
respect to the transactions contemplated hereunder.  This Agreement including
the Exhibits and Schedules attached hereto supersedes any and all other prior
understandings and agreements between the Parties hereto (other than the
Confidentiality Agreements) and it may not be changed, waived, discharged or
terminated orally but only in writing by a party against which enforcement of
the change, waiver, or discharge or termination is sought.

     10.7  General.  The paragraph headings contained in this Agreement are for
           -------                                                             
reference purposes only and shall not affect in any way the meaning or
interpretation of this Agreement.  This Agreement and the Exhibits attached
hereto may be executed simultaneously in two or more counterparts, each of which
shall be deemed an original, all of which shall become one and the same
instrument.  This Agreement and the Exhibits attached hereto shall inure to the
benefit of and be binding upon the parties hereto and their respective
successors; it shall not be assigned.

     10.8  Governing Law.  This Agreement shall be construed in accordance with
           -------------                                                       
the laws of the State of Maryland.

     10.9  Counterparts.  This Agreement and each of the exhibits or schedules
           ------------                                                       
hereto may be executed (by facsimile signature or otherwise) in two or more
counterparts, each of which shall constitute one and the same agreement.

                                     - 52 -

 
     IN WITNESS WHEREOF, Lockheed Martin, CalComp and Summagraphics have caused
this Agreement to be duly executed by their respective chairmen or presidents
and their respective seals to be hereunto affixed and attested by their
respective secretaries thereunto duly authorized as of the date first written
above.


                               LOCKHEED MARTIN CORPORATION


                                By:___________________________
                                   Peter B. Teets
                                   President - Lockheed
                                     Martin Information &
                                     Technology Services Sector


                               CALCOMP INC.


                               By:___________________________
                                  Gary Long
                                  President


                               SUMMAGRAPHICS CORPORATION


                               By:___________________________
                                  Michael S. Bennett
                                  President and Chief Executive
                                    Officer

                                     - 53 -