Wikipedia (/ˌwɪkɨˈpiːdiə/ or /ˌwɪkiˈpiːdiə/ WIK-i-PEE-dee-ə) is a free-access, free content Internet encyclopedia, supported and hosted by the non-profit Wikimedia Foundation. Almost anyone who can access the site can edit almost any of its articles. Wikipedia is the sixth most popular website and constitutes the Internet's largest and most popular general reference work. As of 2014, it has 18 billion page views and nearly 500 million unique visitors each month.
Jimmy Wales and Larry Sanger launched Wikipedia on January 15, 2001. Sanger coined its name, a portmanteau of wiki (from the Hawaiian...