Provides an overview of methods for improving the effectiveness of Boolean retrieval systems, including document clustering, relevance feedback, weighted term searching, ranked output, and fuzzy set theory. The discussion of experimental studies with the SMART and SIRE systems focuses on the implementation and results of these methods. (69…

Five papers discuss factors affecting human interactions with online information systems. Topics covered include the use of discourse analysis for interaction functions specification; the impact of optical data disks; the need for research into the search process; user access to data dictionaries; and the development of full text systems. (CLB)