Write that primer Marion - most stuff about technical things tends to be written by people who are really into that stuff, and can't understand how anyone can fail to pick it up in a hurry.

Even when books are published with titles like "Computers for people who haven't a clue" by the time you get to the second chapter, the readers are expected to be up and running techno-freaks.

I could just about understand the questions. I'm still working on Whistle Stop's answers, but I think I'd better lie down first.

I think the old army system of instruction has a lot to be said for it - say what you are goin to explain, then explain, then say what you have just explained.