Wikipedia is a free online encyclopedia, created and edited by volunteers around the world and hosted by the Wikimedia Foundation.

The English-language Wikipedia is celebrating its 25th birthday! Learn how you can take part in the encyclopedia's continued improvement.

Wikipedia[c] is a free online encyclopedia written and maintained by a community of volunteers, known as Wikipedians, through open collaboration and the wiki software MediaWiki. Founded by Jimmy …

The English Wikipedia is the primary [a] English-language edition of Wikipedia, an online encyclopedia. It was created by Jimmy Wales and Larry Sanger on January 15, 2001, as Wikipedia's first edition.

Search the 278,811 articles in the Simple English Wikipedia How to write Simple English pages · Useful pages · Simple talk · Categories · Help Schools Gateway (for users who want to make changes from …

Look up // in Wiktionary, the free dictionary. The two slashes // may indicate: a comment marker in several programming languages including C, C++, JavaScript and Java the root directory path in …

Wikipedia is a free online encyclopedia that anyone can edit, and millions already have. Wikipedia's purpose is to benefit readers by presenting information on all branches of knowledge.