MediaWiki is a popular web-based wiki software application, which powers Wikipedia. Numerous other wikis around the world also use it to power their websites and many of our clients use this as well. We at HamaraShehar.com use it to document all internal projects and document run books, reference materials, training materials, etc. The biggest advantage of a wiki is it stores revisions of all content and you can see complete change history, who modified it, when it is modified, the exact modification done and you can also restore a previous revision if required. You can notice the same at http://wikipedia.org/, for eg: see revision history of a page about WikiPedia at http://en.wikipedia.org/w/index.php?title=MediaWiki&action=history.
Wiki can be hosted for public viewing or limit access to within your office network or even protect it with password for personal use. We can help you hosting your wiki in any of the above configurations and provide professional support. If you already have a wiki and want to migrate, please contact us for free migration.