Sometimes it depends upon the direction as well.... Here's a William Shatner clip as presented on the Stern show

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Just to toss this out (it's certainly not canon, at least not TV/Film canon), Diane Duane's novel Spock's World featured a ship wide bulletin board system (BBS) that allowed some insights into the minds of the crew regarding the secession of Vulcan from the UFP (the plot of the novel). It's been a looong time since I…

The US film was Special Bulletin (1983).