Description: Wikipedia is a Web-based, multi-language, free-content encyclopedia written collaboratively by volunteers using the same wiki technology seen here on wikidweb.
Wikipedia contains about 2.3 million articles. More than 700,000 of these are in English, but there are also translations into over 100 different languages. Entries are on traditional encyclopedic topics and on almanac, gazetteer, and current events topics.
Its purpose is to create and distribute a free, reliable encyclopedia in as many languages as possible —indeed, the largest encyclopedia in history, in terms of both breadth and depth. According to Hitwise, an online measurement company, Wikipedia is the most popular reference site on the web.