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

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

Dec 17, 2025 · Noun wiki (plural wikis) A collaborative website which can be directly edited merely by using a web browser, often by anyone who has access to it.

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 …

Welcome! The Wikimedia movement is a global community of people, projects, and activities working together to create and share knowledge freely. Join us in making all knowledge …

Nov 17, 2025 · wiki, website that can be modified or contributed to by users. Wikis can be dated to 1995, when American computer programmer Ward Cunningham created a new collaborative …

The software, whose name is based on a Hawaiian term for "quick," allows website visitors to contribute content to its pages and comment on and make changes to information posted by …

"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's main page (20 December 2001) Wikipedia, a free-content online encyclopedia written and maintained by a community of volunteers known as Wikipedians, began with its first edit …

Overview Every wiki can be changed, or edited, by anyone who has an account on the wiki, or by everyone in the world if the wiki allows it. Some important pages can only be changed by …