Rather than pollute Neil's "Glossary" thread with irreverent gumpf I thought that it may be worthwhile starting a new thread..
The following was related to me by a co-worker who swore blind that he was actually present when the following exchange took place. However I have long suspected that he was pulling my leg. Either way I think that it makes a nice story.
An IBM sales person had been flown in from the USA to give a presentation at the unveiling of a brand new IBM minicomputer (a genre that has long since vanished into obscurity). At one point the salesman had a block diagram of the machine up on the overhead projector. Each block labelled with the appropriate acronym – CPU, RAM etc.
After discussing each block in turn, but making no mention of a little block off to the side labelled AMD someone eventually put up their hand and asked what it was, the salesman, in a broad Southern drawl, replied "oh that's simple, it is an Air Movement Device", he continued "we used to have it labelled FAN but no one could figure out what it stood for".