If if recall, there is a difference. When looking for a system, there isn't, but they most times mean something different.
A Messageboard is more of a thing for meetup groups, and teams, that they can post things that need to go on, and upcoming things. Often used for blogs.
A forum is open to most discussion based on the topic its about. Not really limited to much.
I found this two sites.... One is a forum and one is a messageboard....
One is called Ragnaboard where the theme is about ragnarok online, a mmorpg game... Another is the TantraForums where the theme is about Tantra online, another mmorpg game...
I'm on a page about incorrect corrections, and spent the better part of like two hours trying to get someone to understand that -5^2 = -25, not 25, and then that post had comments get reposted because that group is self sustaining, and that person was in turn trying to explain what I just explained to them. And I'm taking that as a victory
I will be AFK for a couple of days you guys hold down the fort while I am gone. I will be checking in on my phone but that will severly limit me. Be back saturday!