Wikipedia is a free-content encyclopedia, written collaboratively by people from around the world. The site is a wiki, which means that anyone can edit articles, simply by clicking on the edit this page link. It runs on MediaWiki software.

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Wikipedia began on January 15, 2001 by founders Jimmy Wales, Larry Sanger, and a few enthusiastic English-language collaborators. Four years later, as of December 2004, there were 13,000 active contributors working on over 1,300,000 articles in more than 100 languages. As of today, there are 572976 articles in English; every day hundreds of thousands of visitors from around the world make tens of thousands of edits and create thousands of new articles.

All text in Wikipedia, and most images and other content, is covered by the GNU Free Documentation License (GFDL). Contributions remain the property of their creators, while the GFDL license ensures the content will remain freely distributable and reproducible (see the copyright notice and the content disclaimer for more information)

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