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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.
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 the ...
The card catalog was a familiar sight to library users for generations, but it has been effectively replaced by the online public access catalog (OPAC). Some still refer to the online catalog as a "card catalog". [2] Some libraries with OPAC access still have card catalogs on site, but these are now strictly a secondary resource and are seldom ...
756372754. WorldCat is a union catalog that itemizes the collections of tens of thousands of institutions (mostly libraries), in many countries, that are current or past members of the OCLC global cooperative. [3] It is operated by OCLC, Inc. [4] Many of the OCLC member libraries collectively maintain WorldCat's database, the world's largest ...
OCLC, Inc. OCLC, Inc., doing business as OCLC, [4] is an American nonprofit cooperative organization "that provides shared technology services, original research, and community programs for its membership and the library community at large". [2] It was founded in 1967 as the Ohio College Library Center, then became the Online Computer Library ...
The Ngram Viewer is a service connected to Google Books that graphs the frequency of word usage across their book collection. The service is important for historians and linguists as it can provide an inside look into human culture through word use throughout time periods. [30]
United States. The Whole Internet User's Guide and Catalog, by Ed Krol, was published in September 1992 by O'Reilly. The Los Angeles Times notes that the Whole Internet User's Guide and Catalog was the "first popular book about the medium" and "was later selected by the New York Public Library as one of the most significant books of the 20th ...
A union catalog is a combined library catalog describing the collections of a number of libraries. Union catalogs have been created in a range of media, including book format, microform, cards and more recently, networked electronic databases. Print union catalogs are typically arranged by title, author or subject (often employing a controlled ...
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