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| Rahn, Erwin | 1 |
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Peer reviewedRahn, Erwin – Library Hi Tech, 1984
Discusses the evolution of standards for bar codes (series of printed lines and spaces that represent numbers, symbols, and/or letters of alphabet) and describes the two types most frequently adopted by libraries--Code-A-Bar and CODE 39. Format of the codes is illustrated. Six references and definitions of terminology are appended. (EJS)
Descriptors: Character Recognition, Definitions, Information Retrieval, Library Automation
Peer reviewedHessler, David W. – Library Hi Tech, 1984
Details distinction between digital and analog data, advantages of analog storage, and optical disc use to store analog data. Configuration and potential of three levels of laser disc systems are explained. Selection of display devices for use with laser disc systems and accessing audio data are addressed. (Continued in next issue.) (EJS)
Descriptors: Display Systems, Information Retrieval, Information Storage, Information Systems
