An encyclopedia (or encyclopædia) is a comprehensive written compendium that contains information on either all branches of knowledge or a particular branch of knowledge.

The biggest multilingual free-content encyclopedia on the Internet. Over 7 million articles in over 200 languages, and still growing.

An encyclopedia (alternatively "encyclopaedia") is a written compendium of human knowledge. Encyclopedias can be generalist, containing articles on topics in all fields, or they ...

Wikipedia (pronunciation) is a free, multilingual, open content encyclopedia project operated by the non-profit Wikimedia Foundation. Its name is a blend of the words wiki (a ...

Wikipedia (pronunciation) is a free, multilingual, open content encyclopedia project operated by the United States-based non-profit Wikimedia Foundation.