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Abstract
Virtual information systems are made posisble by the advent of gateway or front-end software, which allows a user to access multiple computer systems via a single terminal and single log-on. Such virtual systems bring together more extensive selection of on-line services than could be comfortably accessed previously. Eqully important as the improved breadth and ease of access is th epowerful information analysis and processing capability qhich these systems provide. A general review of the current status of virtual information systems 1s followed by a description of a prototype system developed by Lawrence Livermore National Laboratory.