Defines the interactive timeout interval (ITI) as the amount of time that is allowed to lapse between user entries before the computer assumes that the terminal is abandoned and stops polling it. A method for determining optimal ITI, thereby increasing system efficiency of online catalogs, is demonstrated. (10 references) (CLB)

Describes PCBIS, a database program for MS-DOS microcomputers that features a utility for automatically converting online public access catalog search results stored as text files into structured database files that can be searched, sorted, edited, and printed. Topics covered include the general features of the program, record structure, record…

Describes minimal-level, or provisional, authority records that are constructed from headings in bibliographic records as part of a computer validation process. Two types of references that can be generated automatically for authority records are explained: (1) those based on other data in the bibliographic record, and (2) those derived from the…

The functions of electronic mail and online catalogs are described, and the possible uses of the two in conjunction for library purposes are explored, including notes between librarians, broadcast news, patron notifications, selective information dissemination, and interlibrary loans. (Author/CLB)

Reports the results of a survey of libraries having authority control and using authority control vendors, which was conducted to examine online maintenance features of present systems. The features discussed include global updates; uniqueness, hierarchical, and reciprocity checks; human intervention; field validation; and frequency of authority…

Investigates methods of compressing headings identified by MARC subfield codes to reduce the size of browsable displays. An argument is made for sorting subdivisions by a conceptual, rather than an alphabetical, approach to present efficient browsable displays and relieve the user of the burden of data organization. (14 references) (Author/CLB)

Describes the development and implementation of software that provides a global change capability by allowing correction of a single heading in a large file of bibliographic records through programatic identification and replacement. Specific change processes are described, including name headings, geographic headings, and topical subject…

Discusses special problems that the symbols for sharps and flats in music notation present for the retrieval of music materials in online catalogs, and describes the results of a survey of vendors of online systems that was conducted to determine how vendors deal with this notation. (nine references) (LRW)

Discusses methods of browsing in online public access catalogs (OPACs) and describes one method that uses information pertaining to the physical description of books from MARC records to simulate images of books on a library shelf. Electronic browsing through MARC is discussed, and methods of enhancing OPACs are reviewed. (51 references) (LRW)

Discusses problems of information distortion resulting from romanization (i.e., representation of nonroman scripts in Latin characters) and modifications of USMARC format to support nonroman scripts in library catalogs. Efforts to develop a universal character set and its potential effects on USMARC are considered. (45 references) (MES)

Describes the Multimedia Visualizer, an online public access catalog (OPAC) that uses animated visualizations to make it more user friendly. Pictures of the system are shown that illustrate the interactive objects that patrons can access, including card catalog drawers, librarian desks, and bookshelves; and access to multimedia items is described.…

Describes a survey that examined ways in which users interacted with the authority control of online catalogs developed commercially and locally. The two types of system are compared in terms of displayed messages related to authority control and system capabilities to aid users in understanding the relationships between headings. (CLB)

Describes a project at the Princeton University libraries that converted the pre-1981 public card catalog, using digital imaging and optical character recognition technology, to fully tagged and indexed records of text in MARC format that are available on an online database and will be added to the online catalog. (LRW)

Outlines a process for downloading MARC format bibliographic data into a form readable for an Apple Macintosh computer running HyperCard software. Loading procedures for two data sources--an OCLC format tape and records from UCLA's ORION public access catalog--are discussed, and the use of a minicomputer system is considered. (eight references)…

Describes the results of surveys that examined how academic libraries are employing authority control, the impact of AACR2 and online catalogs on the need for authority control, and the effect of OCLC cataloging on a university library catalog established without authority control for corporate or personal names. (62 references) (Author/CLB)