Provides an overview of factual data banks and full text files available on optical data disks. Each entry in the directory includes the name of the data bank or file; producer; distributor; frequency of updates; period covered; subscription price; and a summary of the contents. Addresses of producers and distributors are provided. (CLB)

Provides an overview of 50 bibliographic databases and library cataloging services currently available on CD-ROM. Entries include the name of the database; producer; frequency of updates; period covered; number of items included; subscription price; and a summary of the contents. Addresses of producers are also provided. (MES)