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A wiki is a type of collaborative software program that typically allows web pages to be created...

A wiki is a type of collaborative software program that typically allows web pages to be created and collaboratively edited using a common web browser. Websites running such programs are themselves referred to as wikis. A wiki system is usually an application server that runs on one or more web servers. The content is stored in a file system, and changes to the content are stored in a relational database management system. The first such system was created by Ward Cunningham in 1995, but given the relative simplicity of the wiki concept, ranging from very simple core implementation functionality to highly sophisticated content management systems. The primary difference between wikis and more complex types of content management systems is that wikis tend to focus on the content, at the expense of the more powerful control over layout seen in content management systems (CMS) or at the expense of non-wiki features (news articles, blogs,..). The software required to run a wiki might include a web server such as Apache, in addition to the wiki program itself. In some cases the web server and wiki program are bundled together as one self-contained system, which can often make them easier