Re: Why was it called Demon?
Ok, here is the *real* story as to why it was called Demon. As I mentioned in the obituary, Cliff had a company called ImPETus, which wrote code on Commodore PETs. So the joke was our software was In PETs. That went broke because we charged too little for our really rather good software.
Cliff started up again, with two other people. one of whom raced high-performance radio control cars competitively and successfully. The rules of indoor scale model racing are very tight, one of the regulations was a cost cap on the motors. The best at the time were Demon Power motors. So looking for a name for the reborn software company they chose the name Demon, because the colleague liked the name. That became Demon Systems and when Cliff's tenner a month took off, Demon Internet was born from Demon Systems.
When ImPETus went broke Cliff laid me off, it was my first job out of school and Cliff was really, really good about it. That meeting, which I can still vividly remember 42 years on, turned Cliff from my boss to a friend. I learnt that firing someone is harder than being fired. He called around some friends to try and find me a job, and asked me to keep the keys to the office and the company credit card in case they could have me back.
There is probably a revisionist name around why the company was called Demon, but when I see companies spending fortunes on branding I'll think of Demon and Amstrad that built multimillion businesses by just having a name the CEO liked.