• A wiki (sometimes spelled "Wiki") is a server program that allows users to collaborate in forming the content of a Web site. With a wiki, any user can edit the site content, including other users' contributions, using a regular Web browser. Basically, a wiki Web site operates on a principle of collaborative trust. The term comes from the word "wikiwiki," which means "fast" in the Hawaiian language.
• • Interesting definition of word origin

• A wiki allows a group of people to enter and communally edit bits of text. These bits of text can be viewed and edited by anyone who visits the wiki.
• Online Networking Image Gallery A wiki is a collection of articles that multiple users can add to and edit freely online.  See more online networking pictures.
• That's­ it. What it means is that, when you come to a wiki, you are able to read what the wiki's community has written. By clicking an "edit" button on an article, you are able to edit the article's text. You can add or change anything you like in the article you are reading.
• • Reliability?

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  What Is Wiki

        Wiki is in Ward's original description:

  The simplest online database that could possibly work.

  Wiki is a piece of server software that allows users to freely create and edit Web page content using any Web browser. Wiki supports hyperlinks and has a simple text syntax for creating new pages and crosslinks between internal pages on the fly.

  Wiki is unusual among group communication mechanisms in that it allows the organization of contributions to be edited in addition to the content itself.

  Like many simple concepts, "open editing" has some profound and subtle effects on Wiki usage. Allowing everyday users to create and edit any page in a Web site is exciting in that it encourages democratic use of the Web and promotes content composition by nontechnical users.