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The main academic full-text databases are open archives or link-resolution services, although others operate under different models such as mirroring or hybrid publishers. Such services typically provide access to full text and full-text search, but also metadata about items for which no full text is available.
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 MP4 file format defined some extensions over the ISO Base Media File Format to support MPEG-4 visual/audio codecs and various MPEG-4 Systems features such as object descriptors and scene descriptions. Some of these extensions are also used by other formats based on the ISO base media file format (e.g., 3GP). [ 1]
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Internet Archive is an American nonprofit digital library website founded in 1996 by Brewster Kahle. [ 1 ][ 2 ][ 4 ] It provides free access to collections of digitized materials including websites, software applications, music, audiovisual, and print materials. The Archive also advocates for a free and open Internet.
WorldCat. 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 ...
The Card Catalog at the Library of Congress. 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.
The Internet Archive Scholar is a scholarly search engine created by the Internet Archive in 2020. It contained, as of February 2024, over 35 million research articles with full text access. The materials available come from three different forms: content identified by the Wayback Machine, by digitized print material and sources such as uploads ...