Wikis allow small groups to add, revise and edit web content, so it is a natural tool for most collaborative writing activities. A wiki is a page or site that is fully editiable from a browser using a simple "mark-up" language. Like a web site, it allows for non-linear linking of individual wiki pages. Whenever a wiki page is edited, a new version of the pages is created with the old version being archived for site editors' reference.

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