This component allows you to publish articles in the format of a knowledgebase. Access to the articles can be controlled by using the Joomla! 1.5 built in ACL along with two aditional levels built into the KBase component. There is also a search plugin available to allow the Joomla! 1.5 system to search the articles.

Read more at: http://extensions.joomla.org/component/option,com_mtree/task,viewlink/link_id,3992/Itemid,35/