Wikipedia

  • wikipedia
    an incomplete sphere made of large, white, jigsaw puzzle pieces. each puzzle piece contains one glyph from a different writing system, with each glyph written in black.
    the wikipedia wordmark which displays the name wikipedia, written in all caps. the w and the a are the same height and both are taller than the other letters, which are also all the same height.
    the , a globe featuring glyphs from various writing systems
    screenshot
    main page of the english wikipedia
    main page of the english wikipedia on july 23, 2018
    type of site
    online encyclopedia
    available in285 languages
    country of originunited states
    ownerwikimedia foundation
    created byjimmy wales
    larry sanger[1]
    urlwww.wikipedia.org edit this at wikidata
    alexa rankdecrease 13 (global, february 2020)[2]
    commercialno
    registrationoptional[note 1]
    users>315,147 active users[note 2] and >85,634,144 registered users
    1,145 administrators (english)
    launchedjanuary 15, 2001; 19 years ago (2001-01-15)
    current statusactive
    content license
    cc attribution / share-alike 3.0
    most text is also dual-licensed under gfdl; media licensing varies
    written inlamp platform[3]
    52075003

    wikipedia (ə/ (about this soundlisten) pee-dee-ə or ə/ (about this soundlisten) 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  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 links to related wikipedia articles. youtube announced a similar plan in 2018.[29]

  • history
  • openness
  • policies and laws
  • governance
  • community
  • language editions
  • reception
  • operation
  • access to content
  • cultural impact
  • related projects
  • see also
  • notes
  • references
  • further reading
  • external links

Wikipedia
An incomplete sphere made of large, white, jigsaw puzzle pieces. Each puzzle piece contains one glyph from a different writing system, with each glyph written in black.
The Wikipedia wordmark which displays the name Wikipedia, written in all caps. The W and the A are the same height and both are taller than the other letters, which are also all the same height.
The , a globe featuring glyphs from various writing systems
Screenshot
Main page of the English Wikipedia
Main Page of the English Wikipedia on July 23, 2018
Type of site
Online encyclopedia
Available in285 languages
Country of originUnited States
OwnerWikimedia Foundation
Created byJimmy Wales
Larry Sanger[1]
URLwww.wikipedia.org Edit this at Wikidata
Alexa rankDecrease 13 (Global, February 2020)[2]
CommercialNo
RegistrationOptional[note 1]
Users>315,147 active users[note 2] and >85,634,144 registered users
1,145 administrators (English)
LaunchedJanuary 15, 2001; 19 years ago (2001-01-15)
Current statusActive
Content license
CC Attribution / Share-Alike 3.0
Most text is also dual-licensed under GFDL; media licensing varies
Written inLAMP platform[3]
52075003

Wikipedia (ə/ (About this soundlisten) PEE-dee-ə or ə/ (About this soundlisten) 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  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 links to related Wikipedia articles. YouTube announced a similar plan in 2018.[29]