wiki's are a means of sharing information between people.  They allow people to contribute information and edit existing content.

wiki's can be:

• searched
• page protected
• edited
• and much more.

There are many example of wiki's with the on line directory wikipedia being the most famous.

An example created and maintained by alphatronica ltd is Colton History Society. Click on the wiki text at the top right hand side of themenu line.