Wikipedia (
i/ˌwɪkᵻˈpiːdiə/ or i/ˌwɪkiˈpiːdiə/ wik-i-pee-dee-ə) is a free online encyclopedia that aims 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 among the ten most popular websites.[7] Wikipedia is owned by the nonprofit Wikimedia Foundation.[8][9][10]
i/ˌwɪkᵻˈpiːdiə/ or i/ˌwɪkiˈpiːdiə/ wik-i-pee-dee-ə) is a free online encyclopedia that aims 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 among the ten most popular websites.[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] aportmanteau of wiki[notes 4] and encyclopedia. There was only the English language version initially, but it quickly developed similar versions in other languages, which differ in content and in editing practices. With 5,329,911 articles, the English Wikipedia is the largest of the more than 290 Wikipedia encyclopedias. Overall, Wikipedia consists of more than 40 million articles in more than 250 different languages[15] and, as of February 2014, it had 18 billion page views and nearly 500 million unique visitors each month.[16]
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 Encyclopædia Britannica's.[17] Criticism of Wikipediaincludes claims that it exhibits systemic bias, presents a mixture of "truths, half truths, and some falsehoods",[18] and that, in controversial topics, it is subject to manipulation and spin.
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