Topics Topic are more specific discussions within the broad areas of the Forum. For example, the Topics within the Forum 'Using the English Listening Lounge' might be such as 'Which Passages are Best', 'How to Use the Transcripts', etc. Each topic consists of a number of messages posted by visitors. Posts These are the messages posted by the visitors. Usually a person posts a message, and then another person posts a reply, and so on.
Any person can post a message, either a reply to post, or start a new Topic.
Anyone can use the discussion forum. Any person can start a topic, or post a reply to a message. But you must first register. It is easy and free. That is so we know who is posting the messages.