The first of three articles describes fluctuations in subject searching on online catalogs over time; the second describes the level of agreement between a research library's use of subject headings and the Library of Congress subject headings; and the third discusses the advantages of incorporating Library of Congress subject headings into online…

Reports results of a study that used an online survey, focus groups, and logs of telnet connections to examine Internet use when accessed through the University of Toronto Library (Canada). Discusses needs of Internet users and reveals patterns of Internet use. An appendix contains the online survey. (JMV)

A survey at the University of Houston examined factors related to subject searching success in online catalogs, including: extent of subject searching; response to unsuccessful searches; reasons subject search is not used; users' awareness of sources of subject terms; and suggestions from users for improving subject searching capabilities. (CLB)

Describes an evaluation of variability in the percentage of subject searching in an online catalog among branch libraries of one university. The results reported include variability by time of day, day of week, and week of semester. The value of this type of information for library administration is discussed. (CLB)

Offers a model for choosing among CD-ROM, end user access, mediated online searching, or locally mounted files as alternatives for extending online catalogs and replacing printed indexes. Estimates of demand and comparisons of costs made at Trinity and Clemson Universities provide a quantitative framework for selection. (Contains four references.)…