Describes two new bibliographic information services being marketed to microcomputer owners by DIALOG, Inc. and Bibliographic Retrieval Services to allow access to databases at low rates during evening hours. Subject focus, selection of a database, search strategies employed on each system are discussed, and the two services are compared. (EJS)

Four information retrieval packages that run on single user microcomputers--CAIRS, INMAGIC, Sci-Mate, SIRE--are examined based on following criteria: storage requirements; hardware requirements; search features (Boolean logic, comparison searching, set building, truncation, and wild card characters); system output; security; system maintenance…