Aviation online Discussion

A discussion forum is hierarchical or tree-like in structure: a community forum can have a amount of subforums, each of which could have numerous subjects. Inside a forum's topic, each new discussion started is known as a thread, and can be answered to by as much people as wish to.
Depending upon the forum's options, users could be unknown or must sign-up with the forum and then subsequently log in in order to post messages. On most forums, users do not have to log in to read existing messages.
Example of this forum is aviation forums.

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