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Computerized Documentation Service-SDI-Selective Dissemination of Information. Annual Report 1972-1973.

The annual report on the activities of the computer-based Information and Documentation Center IDC at the Royal Institute of Technology, Stockholm, Sweden RIT for the fiscal year 1972--1973 (FY 1972--1973) provides an account of the work accomplished by the IDC during the period July 1, 1972 through June 30, 1973. The report includes an overview of the prevalent functions of the IDC during the period including new research projects. An account'is given of the work on query processing for profile construction and maintenance. The distribution of processed and disseminated references on the data bases is presented in statistical tables. The amount of processed references being 1 292 300 and the amount of disseminated references being 1 224 700. The transfer of the retrieval operations to a new computer configuration and the installation and implementation of a new search software VIRA and a new profile maintenance system EPOS is described. During the FY 1972--1973 16 data bases were processed covering a wide range of subject scope in science and technology. The total amount of subscriptions to the SDI service increased to 1 220 corresponding to 5 743 profiles. The user community, user-system interaction, and user training programs as seminars, workshops, conferences are presented by a survey. International contacts, cooperation with external groups, and participation in meetings and committees are reported. Publications compiled by the staff are listed.