My first computer was a Commodore 16, but my second computer, and the first one I really programmed on (in Pascal) was my Atari ST, and I love the story of how the ST came together... I wish there were a book, or a documentary about it, as there are for the Amiga 1000.
But anyway, one source of the history of the ST is Dad Hacker...
Stress: A number of us learned how to juggle. One of the DRI people had a nervous tick in the form of a "quacking" sound, and this spread through the group (a year later some of us were still doing it a little). The word "fine" became a pejorative: "Don’t worry, everything will work out just fine." How are you feeling? Fine, okay?
And it had me thinking, I worked in a particularly stressful place during my degree, and I developed a nervous Coooing...
Like a pigeon, I'm sure if Paul, Leon or Dave are reading this they'll remember me cooing. They took the piss, but I really could not help it at times, sometimes I was totally oblivious that I was doing it.
I think I developed it out of a kind of mental juggling act I was carrying out thinking about the servers being looked after, stressing if the phone would ring to make me have to drop whatever I was doing and do an IT support run, or just the incessant clatter of the mechanical machines knitting on the factory floor, from which we were separated only by a 1.5 inch plaster board wall.
Whatever it was, I didn't quack, I cooed... And really well, I'm cured now, and can't impersonate a pigeon at all, so where my brain came up not only with that sound, but the ability to do that sound, is beyond me.