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EXHIBIT 99
JOINT FILING AGREEMENT PURSUANT TO RULE 13D-1(f)(1)
The undersigned acknowledge and agree that the foregoing statement on
Schedule 13D/A is filed on behalf of each of the undersigned and that all
subsequent amendments to this statement on Schedule 13D/A shall be filed on
behalf of each of the undersigned without the necessity of filing additional
joint filing agreements. The undersigned acknowledge that each shall be
responsible for the timely filing of such amendments, and for the completeness
and accuracy of the information concerning it contained therein, but shall not
be responsible for the completeness and accuracy of the information concerning
the others, except to the extent it knows or has reason to believe that such
information is inaccurate. This Joint Filing Agreement may be executed in any
number of counterparts and all of such counterparts taken together shall
constitute one and the same instrument.
Dated: January 5, 1998
TRW INC.
By: /s/ Xxxxxxx X. Xxxxxxxx
Xxxxxxx X. Xxxxxxxx
Executive Vice President,
General Counsel and Secretary
BDM INTERNATIONAL, INC.
By: /s/ X. Xxxxxx Xxxxxxxx, III
X. Xxxxxx Xxxxxxxx, III
Executive Vice President, Treasurer
and Chief Financial Officer
