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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.
Edmund Scientific Corporation, based in Barrington, New Jersey, was founded in 1942 as a retailer of surplus optical parts like lenses. It later branched out into complete systems like telescopes and microscopes, and in the 1960s, a wide variety of science toys and kits. Through the 1970s and 80s they were best known for their mail order sales ...
Hammacher Schlemmer began as a hardware store specializing in hard-to-find tools in the Bowery district of New York City in 1848. Owned by proprietors Charles Tollner and Mr. R. Stern, [2] it became one of the first national hardware stores. A few months later, Stern withdrew and Tollner continued the business until 1859, moving in 1857 to 209 ...
The ANT catalog [a] (or TAO catalog) is a classified product catalog by the U.S. National Security Agency (NSA) of which the version written in 2008–2009 was published by German news magazine Der Spiegel in December 2013. Forty-nine catalog pages [b] with pictures, diagrams and descriptions of espionage devices and spying software were published.
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". Some libraries with OPAC access still have card catalogs on site, but these are now strictly a secondary resource and are seldom updated.
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 ...
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