1

                                                                   Exhibit 99.17

FOR IMMEDIATE RELEASE
Contact:     Jane Van Ryan, SAIC
             703/734-4097

                        SAIC COMPLETES OACIS TENDER OFFER

         (SAN DIEGO) - March 26, 1999 - Science Applications International
Corporation (SAIC) today announced that 10,018,442 shares, or approximately 
94.3 percent of the outstanding shares of common stock of Oacis Healthcare 
Holdings Corp. (NASDAQ: OCIS), were tendered for $4.45 per share, net to the 
seller in cash, without interest, in response to its tender offer which closed 
on March 25, 1999, based upon a preliminary count by ChaseMellon Shareholder 
Services, L.L.C., the depositary. The shares (which include 27,562 shares 
subject to guarantees of delivery or receipt of additional documentation) will 
be purchased in accordance with the terms of the offer.

         SAIC will proceed with those steps necessary to complete the merger of
Oscar Acquisition Corporation, a wholly-owned subsidiary of SAIC (Oscar), with
and into Oacis. Oscar plans to effectuate the merger by filing a certificate of
merger with the secretary of state of the State of Delaware in accordance with
Delaware law as soon as practicable.

         Pursuant to the merger, any shares of Oacis common stock not tendered
and purchased under the tender offer or otherwise owned by Oscar will be
converted into the right to receive $4.45 per share in cash.

         SAIC is the nation's largest employee-owned research and engineering
company, providing information technology and systems integration products and
services to government and commercial customers. SAIC scientists and engineers
work to solve complex technical problems in telecommunications, national
security, health care, transportation, energy and the environment. With
estimated annual revenues in excess of $4 billion, SAIC and its subsidiaries,
including Telcordia Technologies (formerly Bellcore), have more than 35,000
employees at offices in more than 150 cities worldwide. More information about
SAIC can be found on the Internet at SAIC (www.saic.com). Information about
Telcordia Technologies is available at Telcordia Technologies
(www.telcordia.com.).

                                       ###