Wikidata Free knowledge base Wikiversity Free learning resources Wikiquote Free quote compendium MediaWiki Free & open wiki software Wikisource Free content library …

Dec 7, 2025 · Wikipedia is a free Internet-based encyclopedia, started in 2001, that operates under an open-source management style.

Commons Free media repository MediaWiki Wiki software development Meta-Wiki Wikimedia project coordination Wikibooks Free textbooks and manuals Wikidata Free knowledge base

Jan 7, 2026 · The English Wikipedia, also abbreviated as en-WP, or simply enwiki, is the English-language version of Wikipedia. It is the original Wikipedia, and although the project has since …

We support protect fund openhuman knowledge We are the nonprofit that hosts Wikipedia. We support the people, technology, and policies that enable reliable information to be shared with …

Wikidata Free knowledge base Wikiversity Free course materials Wikiquote Free quote compendium MediaWiki Free & open wiki application Wikisource Free library Wikispecies Free …

In 2003, economics PhD student Andrea Ciffolilli argued that the low transaction costs of participating in a wiki created a catalyst for collaborative development, and that features such …

"A wiki invites all users—not just experts—to edit any page or to create new pages within the wiki website, using only a standard 'plain-vanilla' Web browser without any extra add-ons."

Wikipedia is a free online encyclopedia that allows users to edit and create articles collaboratively in multiple languages.

Wikipedia's name is a combination of two words, wiki and encyclopedia.[3] Wikipedia was started on January 9, 2001, by Jimmy Wales and Larry Sanger as part of an earlier online …