1
                                                                  Exhibit (a)(7)


                           AT&T COMMENCES TENDER OFFER
                           FOR GRC INTERNATIONAL, INC.

For Immediate Release:  Tuesday, February 22, 2000

     NEW YORK - AT&T today announced that its wholly owned subsidiary, LMN
Corporation, commenced its previously announced tender offer to acquire all of
the outstanding shares of GRC International, Inc. for $15 per share in cash.

     The tender offer is scheduled to expire at 12:00 midnight, Eastern time, on
Monday, March 20, 2000, unless extended. The offer is being made pursuant to an
Agreement and Plan of Merger entered into between AT&T and GRC International on
February 14, 2000. The tender offer is subject to certain conditions, including
at least a majority of GRC International's outstanding shares, on a fully
diluted basis, being tendered without withdrawal prior to the expiration of
AT&T's offer, and obtaining clearance of the transaction under federal antitrust
laws.

     This news release does not constitute an offer to purchase or a
solicitation of an offer to sell any securities. The complete terms and
conditions of this tender offer are set forth in an offer to purchase and
related letter of transmittal which are being filed today with the Securities
and Exchange Commission and mailed to GRC International's stockholders.