Reviews the best and worst in databases on disk, CD-ROM, and online, and offers judgments and observations on database characteristics. Two databases are praised and three are criticized. (Author/JMV)

University Microfilms International (UMI) collects, creates, and preserves information from the fields of business, education, engineering, social science, and the popular media and makes it available in print and microform, as well as online, on CD-ROM, and on magnetic tape. The company also develops integrated information delivery systems. (KRN)

Provides an overview of factual data banks and full text files available on optical data disks. Each entry in the directory includes the name of the data bank or file; producer; distributor; frequency of updates; period covered; subscription price; and a summary of the contents. Addresses of producers and distributors are provided. (CLB)

In the first of three articles, the producer of Energyline, Energynet, and Tele/Scope recalls the development of the databases and database business strategies. The second describes the development of biomedical online databases, and the third discusses future developments, including full text databases, database producers as online host, and…

Briefly discusses the extent to which commercial publishers in Canada are using CD-ROM technology, and lists commercial and non-commercial CD-ROM products that are currently available or being developed. The description of each product includes the contents of the database, the producer, and the cost. (CLB)

Discusses online search techniques that can be used to identify inaccuracies and inconsistencies in records of online and CD-ROM databases. Methods that can be used to sample a database for errors in descriptor, name, or coded fields are described, including browsing, matching, looking up cross-references, and searching for implausible record…

Describes an approximate document ranking process that uses a compact array of in-memory, low-precision approximations for document length. Combined with another rule for reducing the memory required by partial similarity accumulators, the approximation heuristic allows the ranking of large document collections using less than one byte of memory…

Discusses proposals for more standardized practices in CD-ROM development, sales, and distribution. Topics discussed include availability of trial copies; pricing policies; installation, including software, instructions, and compatibility; interface procedures; manuals; and vendor support services. A sidebar discusses proposals being addressed by…

Provides an overview of 50 bibliographic databases and library cataloging services currently available on CD-ROM. Entries include the name of the database; producer; frequency of updates; period covered; number of items included; subscription price; and a summary of the contents. Addresses of producers are also provided. (MES)

Describes how to find accurate, current information about telecommunications industries, products and services, rates and tariffs, and regulatory information using electronic information resources available from the private and public sectors. A sidebar article provides contact information for producers and service providers. (KRN)

Places the question of the relatively limited storage capacity of optical data disks when applied to very large databases into practical perspective, and considers some of the possibilities offered by the integration of different databases on a single CD-ROM. The advantages and disadvantages of three production options for integrated databases are…

Presents an overview and statistical profile of currently available CD-ROM databases. Trends in the following areas are discussed: types of databases available (index, source, reference, full text, numeric, software and images); subject areas covered by databases; update frequency; and pricing. A list of key publishers and software is provided.…

Reports information gathered from eight vendors on the preparation of bibliographic data for CD-ROM public access catalogs: (1) sources of bibliographic records; (2) duplicate record handling; (3) holdings and location information; (4) maintaining the database; (5) authority control; (7) record corrections; (7) extraction of subsets; (8)…

Surveys some of the traditional and nontraditional electronic sources of information that can be of use in research and teaching. The discussion includes information about: 1) cost; 2) ease of use; 3) the earliest bibliographic entries; and 4) the frequency of updates. (Author/LMO)

Discusses the results of a survey of commercial CD-ROM databases and compares them with previous annual surveys. Topics discussed include the rapid growth in number of available titles; types of databases; subject areas; hardware requirements; frequency of updates; prices; and CD-ROM's potential as a publishing medium. (seven references) (LRW)