Any confusion as to the appropriate level of intervention should immediately be referred to the Web Development Group. They represent the broadest idea-category or hierarchy distinction into which your clients' discussions may fall. Folders contain discussions. Discussions are generally referred to as sub-topics. They represent specific areas of interest for clients to react to.
Discussions contain messages.
Messages are the lowest level of the message board hierarchy. Announcements, Projects, and Research. These categories are also known as folders.