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      STACKER NOTE                                         STACKER NOTE
                        STAC WINS INJUNCTION HEARING                       
      STAC FAX  1118 (05-13-1994)
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                  Microsoft Request for Injunction Denied
      
           CARLSBAD, Calif., May 13, 1994 -- Stac Electronics (NASDAQ:
      STAC) a leading supplier of data compression products for
      doubling the storage capacity of personal computers, announced
      today that Federal District Judge Edward Rafeedie, in a tentative
      ruling, has denied Microsoft's request for a permanent injunction
      against Stac's use of a DOS preload feature in its Stacker*
      products.  As a result, the Company will continue to ship its
      Stacker products without interruption.
      
           The tentative ruling follows a Federal jury's findings on
      February 23, 1994 that Microsoft infringed two of the Company's
      patents.  In that decision the jury awarded Stac $120,000,000 in
      compensatory damages.  The jury also found in favor of Microsoft
      on one of Microsoft's seven counterclaims with the result that
      Microsoft was awarded $13,600,000 in damages for misappropriation
      of a trade secret identified as a preload function in MS-DOS** 6.
      In its tentative ruling the court said that evidence presented at
      trial indicated that the information Stac used in developing its
      product was no longer subject to trade secrecy protection.
      
           Stac Electronics is a leading supplier of high-performance
      data compression products for personal computers.  Implemented in
      software and silicon, Stac's products are sold direct from the
      Company and through retail and OEM sales distribution channels
      worldwide.
      
      * Indicates trademark or registered trademark of Stac
      Electronics.
      ** Indicates trademark or registered trademark of Microsoft
      Corporation.
      
      Jennings & Company
      Greg Peverill-Conti (415) 974-6200
      
                                      
                                      
                                      
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      Copyright 1994 Stac Electronics