Content Management Systems (CMS) Explained
A content management system is a tool loaded into your website which lets you and your collegues edit your site.
That's it in a nutshell.
A CMS (Content Management System) enables multiple people to work on your site at the same time. You can control who has access to which part of your site. You can also assign levels of access. For example, suppose you only want a group of people to edit parts of the web site but not publish material until Management has approved it.
Some CMS' also have blogs, forums, WIKI's, and response forms. These are all governed through your CMS.