"Wikis"
Clyde

Definition of:  Wikis are an interactive website that users contribute to.  They can add information to it and/or edit existing information.

Most wikis are public, but some are private.  These are known as "gated communities."  

The best known wiki is Wikipedia.  Users can find all sorts of information.

The following site tells how to start your own wiki:
	http://wikibooks.org/wiki/Wiki_science_HowToStartAWiki