Wikipedia

Wikipedia is an online multilingual encyclopedia that was started in 2001. So far, it has over 6 million articles and multiple versions with different languages, with the most popular one being the English Wikipedia.

History
Wikipedia was launched on January 15, 2001, by Jimmy Wales and Larry Sanger; Sanger coined its name as a blending of "wiki" and "encyclopedia". In 2006, Time magazine stated that the policy of allowing anyone to edit had made Wikipedia the "biggest (and perhaps best) encyclopedia in the world".

Topic
Wikipedia documents subjects that are deemed notable enough for their inclusion in it. It focuses on content in a neutral point of view.

Size and popularity
Wikipedia versions in other languages were quickly developed soon after the English Wikipedia launched. Its combined editions comprise more than 57 million articles, attracting around 2 billion unique device visits per month, and more than 17 million edits per month (1.9 edits per second).