EXHIBIT 10.14 [Letterhead of Infodata Systems Inc.] Mr. Richard M. Tworek 3856 St. Clair Court Monrovia, MD 21770 Dear Richard, Reference is made to your employment agreement with Infodata Systems Inc. dated October 11, 1995. The undersigned hereby...

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                                                                   EXHIBIT 10.14
    


   
                     [Letterhead of Infodata Systems Inc.]
    

   
Xx. Xxxxxxx X. Xxxxxx
0000 Xx. Xxxxx Xxxxx
Xxxxxxxx, XX 00000

Dear Xxxxxxx,

Reference is made to your employment agreement with Infodata Systems Inc. dated
October 11, 1995. The undersigned hereby agree that the agreement is hereby
extended for a two year term to expire October 11, 1999.

Infodata Systems Inc.

By: /s/ Xxxxxxx X. Xxxxxxxx
   ------------------------------------
    (Signature)

Name: Xxxxxxx X. Xxxxxxxx
     ----------------------------------
      (Printed)


Agreed: /s/ Xxxxxxx X. Xxxxxx
       --------------------------------
        Xxxxxxx X. Xxxxxx

Date: 12/14/97
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Infodata Systems Inc.         00000 Xxxxxxxx Xxxxx, Xxxxxxx, Xxxxxxxx 00000-0000
          (000) 000-0000     fax: (000) 000-0000     xxx.xxxxxxxx.xxx