FOR IMMEDIATE RELEASE

Contact:
Steven M. Samowich, President, (703) 934-5205
Email: samo@infodata.com

Curtis D. Carlson, Corporate Secretary (703) 934-5205
Email: carlson@infodata.com

          INFODATA SYSTEMS INC. TO BE ACQUIRED BY SCIENCE APPLICATIONS
                            INTERNATIONAL CORPORATION

       Fairfax, VA, January 11, 2002 - Infodata Systems Inc. (OTCBB:INFD),
announced today that it has entered into a definitive agreement to be acquired
by Science Applications International Corporation (SAIC). The agreement provides
for the merger of a wholly-owned subsidiary of SAIC with and into Infodata, as a
result of which Infodata will be a wholly-owned subsidiary of SAIC. Consummation
of the merger, which is expected in the first quarter of 2002, is conditioned
upon approval of the transaction by shareholders of Infodata and other customary
closing conditions. Infodata plans to mail a proxy statement to its shareholders
to solicit proxies in connection with a special meeting of Infodata shareholders
at which the proposed merger agreement will be voted on.

       Under the terms of the merger agreement, SAIC will pay $1.00 per share in
cash for each outstanding share of Infodata common stock. The purchase price
represents a premium of approximately 41 percent to Infodata shareholders, when
compared to the $0.71 closing sale price of the common stock as quoted in the
over-the-counter Bulletin Board on January 10, 2002. Infodata was advised in the
transaction by, and received a fairness opinion from, Investec PMG Capital.

       SAIC is the nation's largest employee-owned research and engineering
company, providing information technology, systems integration and eBusiness
products and services to commercial and government customers. SAIC engineers and
scientists work to solve complex technical problems in telecommunications,
national security, health care, transportation, energy, the environment and
financial services. With annual revenues of $5.9 billion, SAIC and its
subsidiaries, including Telcordia Technologies, have more than 40,000 employees
at offices in more than 150 cities worldwide. More information about SAIC can be
found on the Internet at www.saic.com.

       Infodata designs, develops and delivers solutions that enable enterprises
to share, maintain and retrieve electronic documents, and provides consulting
and systems integration services and products in the area of knowledge
management to corporate and government organizations.

       Infodata shareholders are urged to carefully read the proxy statement
after it has been mailed to them as it contains important information. Infodata
shareholders also will be able to obtain a copy of the proxy statement at no
cost at the Securities and Exchange Commission's website (www.sec.gov) after the
proxy statement has been filed with the Commission at the time of such mailing.