Ok, here are a few for the younger "techies":
What piece (or pieces) of TV equipment had hidden "Easter Eggs"?
A clue is that with one, you could play a game of "The Towers of Hanoi."
Others played "Asteroids" and one displayed swimming fish?
What piece of test equipment was lovingly called "The Glockenspiel"?
Who was the manufacurer of, and what was a piece of test equipment whose initials
caused much smirking?