Me: *reading work order* Customer states Mac does not have sound

*Me turns on Mac, it makes the signature "BONNNNG" sound*

Me: Uh huh...

Coworker: Rule No. 1 of tech support: The users always lie

Me: True, but still! How do you miss the start up Mac sound?!

So, what's your IT trivia?
One of my favourites is sosumi.
When Apple Computers started up they were sent a "cease and desist" notice by Apple Music (The Beatles).
They reached a settlement that Apple Computers would never publish music and Apple Music would never sell computers.
So when the Mac came out and played a tune on startup, the filename was sosumi.
Wikipedia now appears to dispute this, saying that sosumi wasn't the startup sound, but some other sound - any Mac experts care to comment?