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MediaWiki is a free and open-source wiki software system originally developed by Magnus Manske and released for use on Wikipedia on January 25, 2002, and further enhanced by Lee Daniel Crocker, after which development has been coordinated by the Wikimedia Foundation. It powers several wiki hosting websites across the Internet, as well as most websites hosted by the Wikimedia Foundation, including Wikipedia, Wiktionary, Wikimedia Commons, Wikiquote, Wikivoyage, Meta-Wiki and Wikidata, which defin