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EXHIBIT 21
SUBSIDIARIES OF THE REGISTRANT
<TABLE>
<CAPTION>
JURISDICTION OF
NAME OF SUBSIDIARY INCORPORATION BUSINESS NAME
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<S> <C> <C>
BTG Technology Systems, Inc. * Virginia Tech Systems
Concept Automation, Inc. of America * Virginia CAI
Delta Research Corporation Virginia Delta
BTG Technology Resources, Inc. Florida BTR
Nations, Inc. New Jersey Nations
STAC, Inc. Virginia STAC
BTG Systems Engineering, Inc. Virginia Systems Engineering
</TABLE>
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* A wholly-owned subsidiary of BTG Technology Resources, Inc.
