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Ah yes. After getting addicted to BBSs, then the quarterly bill came in, I wrote my own BBS software (for the BBC micro, later to be sold by Pace) so people could call me instead..! It worked, but I very quickly had to get my own phone line(s)! That ran for many years, even after I left home and moved to London for a new job; my dad got quite good at rebooting it when necessary.