Describes the availability of databases held on DIALOG, ESA-IRS, and DATA-STAR. Database overlap among the systems, prices, database contents, and data transmission costs are addressed; and results of a search of the ENVIROLINE database on each system are presented. The appendix lists subjects referenced on each system and compares database…

Describes a study conducted at Purdue University Library to determine not only the costs of providing online information services to users, but the value of time saved by the end user in having a computer search run and user satisfaction with the results. Six references are listed. (RBF)

Uses the example of bibliographic retrieval services to explore the potential impacts of historic usage trends, technological advances, actions/policies intended to enhance or control evolving services, and other social, economic, and political developments on areas of concern to users of online systems. Eight figures and 23 sources are included.…

Describes how the Computer Database Advice Centre (CDAC) at Ealing College of Higher Education identifies potential user groups, assesses their information needs, and formulates demonstration seminars. Included is a preliminary evaluation of CDAC performance and usefulness, which is based on the demand for seminars and a user questionnaire. Costs…