Offers 10 guidelines for librarians responsible for making decisions on whether to upgrade application software. Examines the Internet, client/server LAN (local area network) architecture, developments in contemporary stand-alone systems, and graphic user interfaces to determine their impact on the upgrading process. (AEF)

Provides a brief description of the Z39.50 information retrieval standard and reviews evaluation criteria and questions that should be asked when selecting a Z39.50 client. Areas for consideration include whether to buy or build a Z39.50 client, the end-user's requirements, connecting to a remote server, searching, managing the search response,…