The online encyclopedia project, Wikipedia, is the most popular wiki-based website, and is one of the most widely viewed sites in the world, having been ranked in the top twenty since 2007.^[3] Wikipedia is not a single wiki but rather a collection of hundreds of wikis, with each one pertaining to a specific language. In addition to Wikipedia, there are hundreds of thousands of other wikis in use, both public and private, including wikis functioning as knowledge management resources, note-taking tools, community websites, and intranets. The English-language Wikipedia has the largest collection of articles: as of February 2020, it has over 6 million articles. Ward Cunningham, the developer of the first wiki software, WikiWikiWeb, originally described wiki as "the simplest online database that could possibly work."^[4] "Wiki" (pronounced [wiki]^{[note 1]}) is a Hawaiian word meaning "quick."^[5][6][7]