The Wikimedia Foundation is the non-profit organization that operates Wikipedia, the free encyclopedia. Our commitment: Imagine a world in which every single human being can freely share in the sum of all knowledge. According to comScore Media Metrix, Wikipedia and the other projects operated by the Wikimedia Foundation receive more than 370 million unique visitors per month, making them the 5th most popular web property worldwide (June 2010). Available in more than 270 languages, Wikipedia contains more than 14 million articles contributed by a global volunteer community of more than 100,000 people. Based in San Francisco, California, the Wikimedia Foundation is an audited, 501(c)(3) charity that is funded primarily through donations and grants. The Wikimedia Foundation was created in 2003 to manage the operation of Wikipedia and its sister projects. It currently employs 50 staff members. Wikimedia works with local chapter organizations in 27 countries or regions to advance the mission of the Wikimedia movement.