Audio cassettes raise new types of problems for special librarians. Confronted with sparse information about the media, the author, through trial and error, eventually produced basic guidelines and criteria for bibliographic control, storage, circulation, and material sources. These are described and workable solutions are presented. (5…

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)