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Wikipedia
 
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Type of site
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Online encyclopedia |
|---|---|
| Available in | 299 languages |
| Owner | Wikimedia Foundation |
| Created by | Jimmy Wales, Larry Sanger[1] |
| Slogan(s) | The free encyclopedia that anyone can edit |
| Website | wikipedia.org |
| Alexa rank |  5 (Global, December 2017) |
| Commercial | No |
| Registration | Optional[notes 2] |
| Users | >296,319 active users[notes 3] and >72,204,580 registered users |
| Launched | January 15, 2001 |
| Current status | Active |
Content license
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CC Attribution / Share-Alike 3.0 Most text is also dual-licensed under GFDL; media licensing varies |
| Written in | LAMP platform[2] |
| OCLC number | 52075003 |
listen) WIK-i-PEE-dee-ə or /ˌwɪkiˈpiːdiə/ ( listen) WIK-ee-PEE-dee-ə) is a free online encyclopedia with the aim to allow anyone to edit articles.[3] Wikipedia is the largest and most popular general reference work on the Internet,[4][5][6] and is ranked the fifth-most popular website.[7] Wikipedia is owned by the nonprofit Wikimedia Foundation.[8][9][10]Wikipedia was launched on January 15, 2001, by Jimmy Wales and Larry Sanger.[11] Sanger coined its name,[12][13] a portmanteau of wiki[notes 4] and encyclopedia. There was only the English-language version initially, but similar versions in other languages quickly developed, which differ in content and in editing practices. With 5,536,756 articles,[notes 5] the English Wikipedia is the largest of the more than 290 Wikipedia encyclopedias. Overall, Wikipedia comprises more than 40 million articles in 299 different languages[15] and, as of February 2014, it had 18 billion page views and nearly 500 million unique visitors each month.[16] The Wikipedia logo contains an incomplete spherical puzzle with each piece having a different glyph on it.
As of March 2017, Wikipedia has about 40,000 high-quality articles, known as Featured Articles and Good Articles, that cover vital topics.[17][18] In 2005, Nature published a peer review comparing 42 science articles from Encyclopædia Britannica and Wikipedia, and found that Wikipedia's level of accuracy approached that of Encyclopædia Britannica.[19] Time magazine stated that the remarkably open-door policy of allowing anyone to edit had made Wikipedia the biggest and possibly the best encyclopedia in the world and it was testament to the vision of Jimmy Wales.[20]
Wikipedia has been criticized for allegedly exhibiting systemic bias, presenting a mixture of "truths, half truths, and some falsehoods",[21] and, in controversial topics, being subject to manipulation and spin.[22]
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