WikiWiki
WikiWiki - a collaborative software application, enabling web documents to be authored collectively using a simple markup scheme and without the content being reviewed prior to its acceptance. Often called Wiki for short.
A WikiWikiWeb is a collaborative hypertext document produced by a community of users by means of a WikiWiki tool.
The original WikiWikiWeb was established by WardCunningham, who invented and named the Wiki concept, and produced the first implementation of a WikiWiki server.
Ward's Wiki remains one of the most popular Wiki sites:
http://www.c2.com/cgi/wiki?WelcomeVisitors
The particular Wiki you are looking at is Wikipedia, an effort to write a complete encyclopedia from scratch, collaboratively. We're currently writing at a pace of about
1200 new pages per month, although it seems that the pace is
actually accelerating.