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.)…

Describes a model which uses patron arrival rate, length of time on the terminal, and library service policies to determine the minimum number of terminals needed. The model is then used to compare the effects of various service policies on the minimum number of terminals. (CLB)

Describes the power of queuing models as a source of detailed, expected performance measures for online catalogs. An illustration of such a performance analysis is provided, and its value to library administrators is discussed. (9 notes with references) (CLB)

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…

This investigation of utilization of machine-readable bibliographic records for government publications in online public access catalogs consists of a literature search, identification of applications of Government Printing Office (GPO) MARC tapes by bibliographic services and libraries, sampling GPO MARC test tape and profiling depository…