E-mail addresses of users can be readily attained through different search engines and online databases. The messages normally remain on the bulletin board for a limited time period. Individuals search for the most appropriate bulletin board for the subject desired. At a given site hundreds of messages will be posted about that subject. Messages can also be posted which are irrelevant to the subject.
Messages can be text, programs, sound files, or pictures.
It is an e-mail discussion group dedicated to a particular topic. Messages sent to the listserver are then broadcast out to all of the subscribers. Some Listservers are moderated where others are not. People not subscribed to a listserver generally are unable to view the content of the discussion of the subscribers. Each room has a name that may relate to the subject matter discussed.