Exhibit 21

The significant subsidiaries of the Registrant, as defined in Section 1-02(w) of regulation S-X, are:

·	CACI, Inc., a Delaware Corporation
·	CACI, INC.-FEDERAL, a Delaware Corporation
		(also does business as "CACI Marketing Systems", "Information Decision Systems", "Demographics on Call" and "CACI IDS")
·	CACI, INC.-COMMERCIAL, a Delaware Corporation
·	CACI Products Company California, a California Corporation
·	CACI Field Services, Inc., a Delaware Corporation
·	CACI N.V., a Netherlands Corporation
·	CACI Limited, a United Kingdom Corporation
·	Automated Sciences Group, Inc., a Delaware Corporation
·	IMS Services, Incorporated, a Maryland Corporation
·	Integrated Microcomputer Systems, Inc., a Maryland Corporation
·	CACI Technologies, Inc., a Virginia Corporation
·	CACI Technology Services, Inc., a Virginia Corporation
·	XEN Corporation, a Virginia Corporation