A general discussion of on-line procedures, batch and real-time updating, types of files and indexes, terminals, and the use of a general-purpose data management system as a vehicle for on-line operation is followed by an Appendix giving detailed information on each on the known systems. (14 references) (Author/NH)

A file management system provides a powerful search tool for library reference groups. The system described produces current awareness and retrospective searches from diverse data bases. The same query language is used to interrogate all data bases in on-line or batch mode searches. (4 references) (Author/DH)

Describes the National Library of Canada's videodisc project which provides keyword index access to more than 1,200 stills of text designed to demonstrate ability of videodisc to store and present library materials in various formats; information retrieval capability of combined videodisc and microcomputer systems; use of videodisc as research…