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Online public access catalog. The online public access catalog ( OPAC ), now frequently synonymous with library catalog, is an online database of materials held by a library or group of libraries. Online catalogs have largely replaced the analog card catalogs previously used in libraries.
The Library of Congress Subject Headings ( LCSH) comprise a thesaurus (in the information science sense, a controlled vocabulary) of subject headings, maintained by the United States Library of Congress, for use in bibliographic records. LC Subject Headings are an integral part of bibliographic control, which is the function by which libraries ...
DA Pamphlet 351–20, The Army Correspondence Course Program Catalog, is an Army publication. The catalog lists all correspondence courses developed and administered by the Army and select Department of Defense activities. The Army Institute for Professional Development (AIPD) publishes a yearly revision of the catalog each October to update ...
Project Gutenberg ( PG) is a volunteer effort to digitize and archive cultural works, as well as to "encourage the creation and distribution of eBooks ." [ 2] It was founded in 1971 by American writer Michael S. Hart and is the oldest digital library. [ 3] Most of the items in its collection are the full texts of books or individual stories in ...
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Electronic publishing (also referred to as e-publishing, digital publishing, or online publishing) includes the digital publication of e-books, digital magazines, and the development of digital libraries and catalogues. [1] It also includes the editing of books, journals, and magazines to be posted on a screen (computer, e-reader, tablet, or ...
Below is a table of online music databases that are largely free of charge. Many of the sites provide a specialized service or focus on a particular music genre. Some of these operate as an online music store or purchase referral service in some capacity. Among the sites that have information on the largest number of entities are those sites ...
Constellation Software (2020-present) Website. www .bibliocommons .com. BiblioCommons is a privately held company, based in Toronto, Ontario, Canada, that develops front end interactive catalog and web services for libraries. In February 2020, BiblioCommons was acquired by Volaris Group, an operating segment of Constellation Software. [ 1][ 2]