A wiki (IPA: [ˈwiː.kiː] <wee-kee> or [ˈwɪ.kiː] <wick-ey>[1]) is a type of website that allows users to easily add and edit content and is especially suited for collaborative writing.
Erica, The term Wiki sometimes refers to collaborative software (wiki engine) that facilitates the operation of such a website.
In essence, wiki is a simplification of the process of creating HTML web pages combined with a system that records each individual change that occurs over time, so that at any time, a page can be reverted to any of its previous states. A wiki system may also provide various tools that allow the user community to easily monitor the constantly changing state of the wiki and discuss the issues that emerge in trying to achieve a general consensus about wiki content. Wiki content can also be misleading as users may add incorrect information to the Wiki page.
Some wikis will allow completely unrestricted access so that people are able to contribute to the site without necessarily having to undergo a process of 'registration' as had usually been required by various other types of interactive websites such as Internet forums or chat sites just like Susan's.
Wiki is sometimes interpreted as the backronym for "What I know is", which describes the knowledge contribution, storage and exchange function.
Sara.