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List of search engines Search engines, including web search engines, selection-based search engines, metasearch engines, desktop search tools, and web portals and vertical market websites have a search facility for online databases .
This article contains a representative list of notable databases and search engines useful in an academic setting for finding and accessing articles in academic journals, institutional repositories, archives, or other collections of scientific and other articles. Databases and search engines differ substantially in terms of coverage and retrieval qualities. [1] Users need to account for ...
Google Scholar is a freely accessible web search engine that indexes the full text or metadata of scholarly literature across an array of publishing formats and disciplines. Released in beta in November 2004, the Google Scholar index includes peer-reviewed online academic journals and books, conference papers, theses and dissertations, preprints, abstracts, technical reports, and other ...
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.
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A library catalog (or library catalogue in British English) is a register of all bibliographic items found in a library or group of libraries, such as a network of libraries at several locations. A catalog for a group of libraries is also called a union catalog. A bibliographic item can be any information entity (e.g., books, computer files, graphics, realia, cartographic materials, etc.) that ...
The Online Books Page was the second substantial effort to catalog online texts, but the first to do so with the rigors required by library science. It first appeared on the Web in the summer of 1993. The Internet Public Library came shortly thereafter.
The first UNESCO World Heritage Sites on the territory of the present Czech Republic were inscribed at the 16th Session of the World Heritage Committee, held in Santa Fe, United States in 1992, when the country was part of the Czech and Slovak Federative Republic (also known as Czechoslovakia ). At this session, three sites were added: the Historic Centre of Prague, the Historic Centre of ...