Z39.50 IMPLEMENTATIONS SUPPORTING STAS
                                       
CAS - Chemical Abstracts Service

   Each implementation described below makes full use of STAS.
   
   Our initial implementation of Z39.50 is part of a research project to
   explore mechanisms for providing user access to commercial online
   services.
   
   CAS is developing a Z39.50 server interface to the Messenger search
   and retrieval software. This Z39.50 server is being used by a pilot
   project for the USPTO to provide experimental Z39.50 access to the
   USPAT file at USPTO from a Z39.50 client developed by CNIDR. CAS will
   also provide Z39.50 access to the Messenger search and retrieval
   software running at FIZ-K in Karlsruhe, Germany, in support of the
   German Library Project.
   
   In addition, CAS is developing an intelligent, easy-to-use Z39.50
   desktop client for search and retrieval of CAS scientific and
   technical databases.
   
CNIDR

   CNIDR has prepared a set of Z39.50 protocol development tools, known
   as Z-Dist. The most current release of Z-Dist was made on December
   4th, 1994. The next release, due around Jan. 5, 1995, will include a
   simple search engine, and email to Z39.50 and WWW to Z39.50 gateways.
   
   The current beta release of Z-Dist forms the backbone of the AIDS
   Patents Project which provides access to United States Patents
   relating to AIDS through a STAS compliant Z39.50 Version 2 server.