The Promise of a Wiki
A wiki is a website or similar online resource which allows users to add and edit content collectively. Imagine how useful it would be to have an online knowledge base that can easily be updated created by key people within your organization. That’s the promise of a wiki — a Web application that “allows users to easily add, remove, or otherwise edit all content, very quickly and easily,” as Wikipedia, perhaps the best-known wiki, puts it. Why not bring the benefits of a wiki to your organization?
MediaWiki is a free software package originally written for Wikipedia but is now run on other projects of the non-profit Wikimedia Foundation and many other wikis.