EXHIBIT 16


                                    ARTHUR
                                   ANDERSEN


                                                 -----------------------------
                                                 Arthur Andersen LLP

                                                 -----------------------------
                                                 8000 Towers Crescent Drive
                                                 Vienna VA 22182-2735
                                                 703-734-7300


August 28, 1998


Office of the Chief Accountant
Securities and Exchange Commission
450 Fifth Street, N.W.
Washington, D.C. 20549


Dear Sir/Madam:

We have read the first  three  paragraphs  of Item 4 included  in the Form 8-K
dated  August  24,  1998,  of  Infodata  Systems,  Inc.,  to be filed with the
Securities  and Exchange  Commission  and are in agreement with the statements
contained therein.

Very truly yours,

ARTHUR ANDERSEN LLP


cc:  Mr. Christopher Dettmar, CFO, Infodata Systems, Inc.