I remember BBSs in my personal life, my favorite was The Well, but I also encountered them in my job as an EDP Auditor for a telecom. In those days, at least in the US, the telecom would charge phone calls by the minute based on 32 bit (not byte, don't be ridiculous) call records. We needed a bit for a new service and someone spotted one that the documentation said was not in use and grabbed it (and reprogrammed the switches to use it). It turned out that somebody else had previously programmed the switches to use it to indicate a call of over 24 hours (and didn't document it). When our revenues went down we discovered that BBSs were keeping calls (or trying to keep, calls would off gang agley) going for over 24 hours while moving large files and without the bit the calls weren't getting billed. A kerfuffle ensued.