"CARBBS stood for "Chris Andrew Royle Bulletin Board System". Ran on a BBC Micro, would even run just using floppy drives. Written in BASIC with bits of machine code in a complementary ROM. Notorious for dropping users into a BASIC prompt. System admin (sysop) interface was very clunky, people who ran CARBBS will have "fond" memories of the blue "waiting for call" screen. CARBBS was also one of the most popular BBC Micro bulletin board systems, if only for the amount of hacking and messing around you could do with the code to make it do your bidding." - Joel Rowbottom