- Def: a program that allows users to collaborate in forming content for a web site. With a wiki, any user can edit the site content, including other users' contributions. Basically, a wiki Web site operates on a principle of collaborative trust. A wiki allows a visitor to edit the content, create new content and change the organization of existing content. The best known example of a wiki web site is "Wikipedia" (http://en.wikipedia.org), an online dictionary building collaboration.
- Wikipedia: a free, open content online encyclopedia created through the collaborative effort of a community of users known as Wikipedeans. The ongoing Wikipedia project began in January 2001 and offers a million articles in English. The Wikipedia Website encourages readers to contribute to the project's development. In addition to the encyclopedia, the non-profit Wikipedia foundation oversees several other open-content projects: Wiktionary, Wikibooks, Wikiquote, Wikisource and Meta-Wiki.