Wikipedia - a multilingual online encyclopedia operating in accordance with the principle of open content. It is based on the MediaWiki software (haw. Wiki - "fast", "fast"), derived from the concept of WikiWikiWeb, allowing any user visiting the site to edit and update its content in real time. The word Wikipedia is a neologism resulting from the combination of the words wiki and encyclopedia. Wikipedia's slogan is "The Free Encyclopedia That Anyone Can Edit."
Wikipedia was established on January 15, 2001 as an auxiliary project of Nupedia, which was written by experts and no longer exists. Since 2003, its owner is the non-profit organization Wikimedia Foundation.
In the first years of its existence, Wikipedia gained a rapidly growing popularity, and the Wikimedia Foundation launched various sister projects. Wikipedia is one of the most visited websites, and many sites have launched mirrors or forks on it.
Wikipedia was created as a complementary project to Nupedia, a free online encyclopedia where articles could be written by anyone but were to be checked and reviewed by a group of experts, similar to the editions of traditional (book) encyclopedias. Nupedia was founded on March 9, 2000 by Bomis Inc, which operated the website. The main people in the company were Jimmy Wales, CEO, and Larry Sanger, editor-in-chief of Nupedia and then Wikipedia. Nupedia has been described by Sanger as being different from the rest of the encyclopedia in that it is available on free documentation, has no article size limitations, and is not biased. Nupedia had a seven-step review process by qualified field experts, but it turned out to be too slow to validate articles. The costs initially covered by Bomis were to be recovered by selling advertising space. Initially, Nupedia operated under its own license called the Nupedia Open Content License, later it switched to the GNU FDL at the request of Richard Stallman.
On January 10, 2001 Larry Sanger on the Nupedia mailing list proposed to build a wiki-based project next to Nupedia. Under the "Let's Make a Wiki" topic, he wrote:
Wales and Sanger attribute the idea of using the wiki to Ward Cunningham and his WikiWikiWeb or Portland Pattern Repository. Wales mentioned that he heard about this idea from Jeremy Rosenfeld, a Bomis employee, who showed him the same wiki, but it was after Sanger heard about it from Ben Kovitz, a wiki expert, who proposed to make a wiki for Nupedia . The GNUPedia project was based on a similar open access concept, but not based on a wiki. The project, however, ceased to be active, and its author, Richard Stallman, lent his support to Wikipedia.
Wikipedia was formally launched on January 15, 2001 as one English-language edition, and its launch was announced by Sanger on the Nupedia mailing list. Initially, it was a supplement to Nupedia, where everyone could write articles, and articles selected after the review were sent to Nupedia. Wikipedia became a standalone venture after Nupedia project partners rejected this model of creating articles. Its principle of "neutral point of view" was codified in the first months of its existence and was similar to the Nupedia principle of "impartiality". Over time, Nupedia's original editors moved to Wikipedia. By the end of its first year of existence, Wikipedia had grown to around 20,000 articles in 18 language editions. At the end of 2002, it had 26 language editions, 46 at the end of 2003 and 161 at the end of 2004. Nupedia and Wikipedia