The Discus administration instructions define these terms as follows:

Board Administrator (formerly known as 'superuser'): The board administrator is a special moderator that has ultimate administrative privileges over all aspects of the configuration and operation of the discussion board. Generally the board administrator is the same person who installed the software.

Moderator: A moderator is an account that has basic administrative pages to manipulate pages, messages, and user accounts. Depending on the selected skin, other information may be available as well.

Basically, the board administrator has complete control over the entire board and has access to all interfaces. A moderator (sometimes referred to as "ordinary moderator" in other documents or the support that DiscusWare provides) has access to only the basic page and user manipulations tools (Page Manager, Access Manager, User Manager, Queue Manager, Log Analysis) as well as, of course, the ability to edit their own profile.