A wiki is a web site that allows users to add, remove, and otherwise edit and change content. At its core, a wiki is a simple online database in which each page is easily edited by any user with a Web browser; no special software or third party webmaster is needed to post content. It also allows for linking among any number of pages. Each article contains a discussion page where editors and readers can talk about the document. By looking at the history of a page, users can track changes and compare the versions of a document. This ease of interaction and operation makes a wiki an effective tool for collaborative writing. A wiki's versioning capability can show the evolution of thought processes as contributors interact with content, helping us to focus more on content and less on who is contributing what. This can be a big culture change. It takes a while to get used to the idea that someone else can change what you wrote. But that also means they can IMPROVE it! So it is a bit like thinking together.
The word ‘wiki’ is derived from the Hawaiian phrase “wiki wiki”, meaning ‘fast’ and is also a backronym for What I Know Is to stress the concept of collaborative co-authoring.
Here is a brief video explaining Wikis.
Social bookmarking in plain English: http://www.commoncraft.com/video-wikis-plain-english
Ward Cunningham, created the first wiki and named after the Hawaiian word for ‘quick’. He was looking for the simplest possible tool to help a group of people share information they were using in a collaborative project.
People often have only one model of wiki practices from the most globally visible wiki, Wikipedia an encyclopedia built and used by many people. You can edit the Wikipedia. Anyone can. But an encyclopedia is just one use for a wiki.
Here is a quick video about wikis: http://dotsub.com/films/index.php?filmid=710 (You can choose many language subtitles)
Click To Play
And other languages here: http://dotsub.com/films/wikisinplainenglish/index.php?autostart=true&language_setting=es_712
Here are 21 short ideas on wiki adoption
Photo from blogefl