Another option for boards is approval moderation. If this option is activated, new posts will be invisible to normal users until an admin approves them. This is useful to arrange long board lists more clearly. Each topic has a subject. Boards have expiration values that determine after how many days their topics will expire or get locked after their last post has been made.
Administrators can also manually lock a topic, so that no new posts can be added to it.
A post is a single public message by a user. It can be either a first post, which starts a new topic, or a reply to an existing topic. Posts can be edited and deleted after posting. A user is anyone who registers an account in the forum. Everyone needs to register to write in the forum, anonymous posting is not possible.