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A wiki is a completely interactive web site. Any page can be edited by any visitor. It is driven by a specialized web server or set of cgi scripts generating dynamic pages from the results of visitor edits. A visitor edits a page by grabbing the current content of a page in an ordinary web form and editing it arbitrarily and then saving it back. Users can also create new pages. Generally the name of a page is the name of a topic. Most wikis are text only. The syntax of a wiki is simpler than HTML, but HTML is recognized by some wikis. Some wikis are very easy to administer. There is no history or automatic backup, however. A wiki is totally "live.
Joseph Bergin (Mon,) studied this question.