FOR IMMEDIATE RELEASE Contact: Joe Waldygo Director of Marketing & PR Voice: 602/690-3215 FAX: 602/293-8065 ARTISOFT AND PERFORMANCE TECHNOLOGY ANNOUNCE DISCONTINUATION OF MERGER NEGOTIATIONS (TUCSON, AZ -- May 21, 1992) -- Artisoft, Inc., the Tucson-based developer and manufacturer of the award- winning LANtastic(R) Local Area Network, and Performance Technology, Inc., the San Antonio-based developer and manufacturer of award-winning local area network products, announced today that they have discontinued negotiations for the acquisition of Performance Technology by Artisoft in a statutory merger. Artisoft and Performance Technology announced in April of this year, the signing of a letter of intent which conditioned completion of the acquisition on the negotiation of a final definitive agreement, and the approval of the definitive agreement by the board of directors of both companies and by the shareholders of Performance Technology. The parties announced today that they have been unable to arrive at a mutually acceptable agreement, and that further negotiations would not be pursued. # # #