A wiki is a server program that allows users to collaboratively contribute content to a website. Editing is done in your web browser using a user-friendly editing tool not too dissimilar to a stripped-down version of MS-Word. But a wiki is more collaborative than your average page authored by one person. A wiki may contain the writing, edits and additions of many, many users. Any user can edit any other users’ contributions.
Additional tools available to wik-heads include author tracking, and locking and even version control and rollback
The most famous wiki is Wikipedia.com which is an online encyclopedia authored by whomever wants to author. Yes, you can make your own edits and additions. Wikipedia now features over 600,000 files with thousands of contributors though they do disclose that “Nonsense and vandalism are usually removed quickly.”
The biggest wiki profile story just hit the pages of mainstream media when the LA Times experimented with a ‘wikitorial’ that allowed readers to rewrite an editorial on the paper’s website. However, the experiment was sabotaged by morons who sabotaged the effort by posting pornographic images.
Not to be outdone, Wikis are beginning to hit corporate intranets too