EXHIBIT 99

                                                                    NEWS RELEASE

                SUMMAGRAPHICS CORPORATION AND LOCKHEED MARTIN'S
            CALCOMP SUBSIDIARY SIGN DEFINITIVE AGREEMENT TO COMBINE

    AUSTIN, Texas and BETHESDA, Maryland, March 20, 1996 -- Summagraphics 
Corporation (NASDAQ:SUGR) and Lockheed Martin Corporation (NYSE:LMT) announced 
today the signing of a definitive agreement to combine Lockheed Martin's 
CalComp subsidiary and Summagraphics Corporation.

    Under the agreement, Summagraphics will issue approximately 40.7 million new
shares of common stock to Lockheed Martin in a tax-free exchange for all of the 
issued and outstanding shares of Lockheed Martin's CalComp subsidiary. As a 
result of this exchange, Lockheed Martin will own approximately 90 percent of 
the combined entity. About 4.7 million shares, or 10 percent, of the combined 
company will continue to be held by existing Summagraphics public shareholders. 
With annual sales of about $350 million, the new company will continue to be 
listed on the NASDAQ.

    "By combining CalComp and Summagraphics through this agreement, existing 
Summagraphics' shareholders will own a continuing interest in a larger, stronger
company that will be able to compete more effectively in its markets," said 
Michael Bennett, Summagraphics' president and chief executive officer.

    "The synergies from the combination of these businesses are expected to 
result in substantial benefits to the companies, their customers and 
shareholders," said Peter B. Teets, president and chief operating officer, 
Information & Technology Services Sector, Lockheed Martin Corporation.

 
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    According to Gary Long, CalComp's president and chief executive officer, the
combined company will be well positioned in the growing computer peripherals 
market through the integration of product lines, distribution channels, and 
research and development.

    The agreement is subject to a number of conditions, including approval by 
Summagraphics' shareholders and requisite regulatory approvals. A proxy 
statement relating to this transaction will be sent to Summagraphics' 
shareholders in late April or early May. It is anticipated that the transaction 
will be close in the second quarter of 1996.

    Summagraphics, based in Austin, Texas, is a leading supplier of high 
performance digitizing tablets and cutters, and manufacturers plotter and 
large-format color printers used principally in computer graphics, 
computer-aided design and other advanced graphics applications. The company has 
about 275 employees worldwide.

    CalComp, based in Anaheim, California, designs and manufacturers computer 
peripherals, such as plotters and printers, and is a leading supplier of 
digitizers and scanners for complex business, CAD and graphic arts applications.
It has about 1,000 employees worldwide.

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CONTACTS:
 Summagraphics Corporation
 Robert Sims (512) 873-1540
 David Osowski (512) 873-1525

 Lockheed Martin Corporation
 Media: Ron Meder (301) 897-6345
 Investors/Analysts: Jim Ryan (301) 897-6584