Explores the new storage technology of optical data disks and introduces a data structure, the inverted signature tree, for storing data on optical data disks for efficient text searching. The inverted signature tree approach is compared to the use of text signatures and the B+ tree. (22 references) (Author/CLB)

This discussion of the Integrated Services Digital Network (ISDN) telecommunications system compares it to existing telephone networks and describes international efforts at standardization, proposed services to business and residential customers, technological developments, and cost considerations. The effects of ISDN developments on the role of…

One of today's major problems in the field of e-learning is that the creation of high-quality content is still rather time consuming and expensive. In the past, many efforts have been made to produce educational content on the fly, but the results were mainly static blocks of recorded lecture lacking sophisticated navigation facilities. Facing…

Describes three commercial, numeric databases that are available in microcomputer diskette format: Micro/Scan Disclosure; Wharton Econometric Forecasting Associates World Economic Service; and Trinet's Survey of Commercial Buying Power. Advantages and disadvantages of the diskette format, search strategies, and a selected list of eight suppliers…

Presents examples of bibliographic, full-text, and numeric databases. Also discusses how to access these databases online, aids to online retrieval, and several issues and trends (including copyright and downloading, transborder data flow, use of optical disc/videodisc technology, and changing roles in database generation and processing). (JN)

Describes the National Agricultural Library's microcomputer-based expert system, which is designed to help users obtain answers to simple reference questions. Building of the system and its linking to external programs and systems are explained, and building of a total information system is proposed. Samples of the program are provided. (CDD)

Uses the different search environments of information brokers and institutional searchers to illustrate the factors that should be considered when selecting microcomputers for search operations. The factors discussed include speed, storage capabilities, displays, modems, printing technologies, facsimile transmission, and portability. A directory…

Reviews the development of technological innovations in information delivery, including microforms, electronic processing, online distribution, full-text abstracts online, floppy disks, downloading, vertical integration, electronic publishing, and optical disks. The impact of technology on the information industry and the need to use technology…

Reviews the current status of electronic archiving, especially in Great Britain and the United States, including current use of various electronic storage media; advantages and utilizations of optical disk technology; trends toward full-text databases and increased videotex use; growing quantity of electronic information; and problems in archiving…

Describes compact disk technology in general and possible library applications, including cataloging, online bibliographic searching, and full text searching, and compares the purchase of optical disk packages to traditional online services. Guidelines are provided for evaluating optical disks which focus on the size of the database, updating…

Reviews reasons why electronic journals have not replaced printed materials, and describes ways in which new technologies such as online searching, full text databases, facsimile transmission, optical disk, and other electronic storage methods are offering alternative methods of access to printed journals. Future technological developments and…

Seven experts in system planning offer their views on how optical disk systems will affect library participation in online networks, and discuss opportunities presented by these new products. (CLB)

InfoTrac is a laserdisc system that provides local computer-access to Information Access Company's periodical databases and offers libraries an extensive, self-contained reference system. The system, which employs an IBM PC microcomputer, a Hewlett-Packard Thinkjet printer, and a Pioneer videodisc player, provides advantages of online searching at…

Discusses library applications of several specific CD-ROM products, including library catalogs, book reviews, databases, encyclopedias, and interactive video programs. Such factors as cost effectiveness, ease of use, and user satisfaction are discussed, and a bibliography of books about CD-ROM is provided. (CLB)

This special feature focuses on recent developments in optical disk technology. Nine articles discuss current trends, large scale image processing, data structures for optical disks, the use of computer simulators to create optical disks, videodisk use in training, interactive audio video systems, impacts on federal information policy, and…