MediaWiki, the software behind Wikipedia, allows users to collaboratively edit web content. Each page has a full history of changes available. Wiki pages do not have a hierarchical arrangement but can be categorized and linked together, allowing large amounts of content to be created without requiring an up-front organization structure.
Middlebury-hosted wikis can be open to the public, visible to the public but only editable by selected users/groups, or restricted to only be viewable/editable by selected users/groups,