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  2. Library of Congress Subject Headings - Wikipedia

    en.wikipedia.org/wiki/Library_of_Congress...

    Access to the continuously revised vocabulary is now available via subscription and free services. Subject headings are normally applied to every item within a library's collection and facilitate a user's access to items in the catalog that pertain to similar subject matter, in order to save time finding items of related subject matter.

  3. OpenThesaurus - Wikipedia

    en.wikipedia.org/wiki/OpenThesaurus

    The cause for the start of the project was the arrival of OpenOffice.org in 2002, which was missing the thesaurus of its parent, StarOffice, due to its licensing.. OpenThesaurus filled that gap by importing possible synonyms from a freely available German/English dictionary and refining and updating these in crowdsourced work through the use of a web ap

  4. Teachers Pay Teachers - Wikipedia

    en.wikipedia.org/wiki/Teachers_Pay_Teachers

    Teachers Pay Teachers (sometimes abbreviated as TPT) is an online marketplace and an American educational website for buying and selling educator resources. It focuses on a PreK-12 audience.

  5. Medical Subject Headings - Wikipedia

    en.wikipedia.org/wiki/Medical_Subject_Headings

    This additional information and the hierarchical structure (see below) make the MeSH essentially a thesaurus, rather than a plain subject headings list. [ 4 ] The second type of term, MeSH subheadings or qualifiers (see below), can be used with MeSH terms to more completely describe a particular aspect of a subject, such as adverse, diagnostic ...

  6. Thesaurus (information retrieval) - Wikipedia

    en.wikipedia.org/wiki/Thesaurus_(information...

    In the context of information retrieval, a thesaurus (plural: "thesauri") is a form of controlled vocabulary that seeks to dictate semantic manifestations of metadata in the indexing of content objects. A thesaurus serves to minimise semantic ambiguity by ensuring uniformity and consistency in the storage and retrieval of the manifestations of ...

  7. List of academic databases and search engines - Wikipedia

    en.wikipedia.org/wiki/List_of_academic_databases...

    Free SafetyLit Foundation: Science.gov: Multidisciplinary: A gateway to government science information and research results from over 60 databases, over 2,200 websites, and over 200 million pages. Free United States Government: Science Citation Index [67] Multidisciplinary: Part of Web of Science. 24,000+ journals across 254 subject disciplines ...