The Ubiquitous Mouse

This one is almost prehistoric - it has a cable. It's in one of our in-store locations where a Bluetooth mouse could be pinched after branch hours, while the store is still open. You would need to be desperate, and nuts, to pinch one of these.
I have, in the past, talked about the time before mice, when everyone thought the DOS function keys were the height of labor saving convenience. I stopped though. Our current generation of staff can't believe that was ever the case, and that I must be a nutter. You lot, however, are old enough to remember, although you may also avoid mentioning it out loud.