Wikipedia: The Free Encyclopedia
Index
Wikipedia is a free multilingual, open content encyclopedia project operated by the United States-based non-profit Wikimedia Foundation. It attempts to collect and summarize all human knowledge in every major language. As of April 2008, Wikipedia had over 10 million articles in 253 languages, about a quarter of which are in English. Wikipedia's articles have been written collaboratively by volunteers around the world, and nearly all of its articles can be edited by anyone with access to the Wikipedia website.

All text in Wikipedia is covered by Creative Commons Attribution-ShareAlike 3.0 Unported License (“CC BY-SA”), and GNU Free Documentation License (“GFDL”), a copyleft license permitting the redistribution, creation of derivative works, and commercial use of content while authors retain copyright of their work.