The BBC have an article on the ZX81: Small black box of computing desire, celebrating 30 years since it launched. Lots of people have commented with their memories. I share many of them, but I particularly wanted to thank my uncle Kingsley. He was one of those forward-looking people who bought one. Unfortunately for him he didn't get on with it. But luckily for me he was generous and gave it my dad. Who in turn was generous enough to spot that I really took to it, quickly getting stuck into programming it, and he let me monopolise it. From a humble 1k ZX81 start, I can trace many of the things I've done since, including the LiveWires summer camp I was involved with for years, and my career so far …