Wikipedia is a free online encyclopedia that is supported by the non-profit Wikimedia Foundation. This website is collaboratively edited by volunteers, multilingual, and contains over 30 million articles in 286 different languages. The article can be edited by almost anyone who has access to the site. Over the years, it has become the most popular and largest reference on the internet. In June 2013 it was ranked 7^th globally among all on Alexa. It was estimated to have 365 million readers.