I also had this book with my 48k spectrum -- I was very young (around 7-8 I think) I would often ponder at the warning associated with this: "the program will

I also had this book with my 48k spectrum -- I was very young (around 7-8 I think) I would often ponder at the warning associated with this: "the program will erase itself - this is to discourage you from using it frivolously."