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Type of site
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Online encyclopedia |
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| Available in | 285 languages |
| Country of origin | United States |
| Owner | Wikimedia Foundation |
| Created by | Jimmy Wales Larry Sanger[1] |
| URL | www |
| Alexa rank |  13 (Global, February 2020)[2] |
| Commercial | No |
| Registration | Optional[note 1] |
| Users | >315,147 active users[note 2]and >85,634,144 registered users 1,145 administrators (English) |
| Launched | January 15, 2001 |
| Current status | Active |
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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[3] |
| OCLC number | 52075003 |
Wikipedia (/ˌwɪkɪˈpiːdiə/ (
listen) wik-ih-PEE-dee-ə or /ˌwɪkiˈpiːdiə/ (listen) wik-ee-PEE-dee-ə) is a multilingual online encyclopedia created and maintained as an open collaboration project[4] by a community of volunteer editors using a wiki-based editing system.[5] It is the largest and most popular general reference work on the World Wide Web,[6][7][8] and is one of the 20 most popular websites ranked by Alexa, as of March 2020.[9] It features exclusively free content and no commercial ads, and is owned and supported by the Wikimedia Foundation, a non-profit organization funded primarily through donations.[10][11][12][13]
Wikipedia was launched on January 15, 2001, by Jimmy Wales and Larry Sanger.[14] Sanger coined its name,[15][16] as a portmanteau of "wiki" (the Hawaiian word for "quick")[17] and "encyclopedia". Initially an English-language encyclopedia, versions of Wikipedia in other languages were quickly developed. With 6 million articles, the English Wikipedia is the largest of the more than 300 Wikipedia encyclopedias. Overall, Wikipedia comprises more than 51 million articles[18] attracting 1.5 billion unique visitors per month.[19][20]
In 2005, Nature published a peer review comparing 42 hard science articles from Encyclopædia Britannica and Wikipedia and found that Wikipedia's level of accuracy approached that of Britannica,[21] although critics suggested that it might not have fared so well in a similar study of a random sampling of all articles or one focused on social science or contentious social issues.[22][23] The following year, Time magazine stated that the open-door policy of allowing anyone to edit had made Wikipedia the biggest and possibly the best encyclopedia in the world, and was a testament to the vision of Jimmy Wales.[24]
Wikipedia has been criticized for exhibiting systemic bias, for presenting a mixture of "truth, half truth, and some falsehoods",[25] and for being subject to manipulation and spin in controversial topics.[26] Wikipedia has also been criticized for gender bias, particularly on its English-language site, where the dominant majority of editors are male. However, Edit-a-thons have been held to encourage female editors and increase the coverage of women's topics.[27][28] Facebook announced that by 2017 it would help readers detect fake news by suggesting lin
