today a number of varieties of wikis are used for different purpose, especially in education.
corporations have also been using wikis to encourage knowledge sharing between groups, especially when offices are far apart.
one important aspect of wikis is the ability to see the editing history of any particular page and revert to an earlier version if needed
this function keeps a kind of automatic journal of editing changes, identifiable by user.
In combination with discussion or talk pages, which are associated with each article, it provides a ready way gor participants to discuss and debate points relatd to the content they are working on.