Bulletin Board System
From Tardis Wiki, the free Doctor Who reference
A Bulletin Board System, BBS for short, was a meeting place for computer users. It wasn't a network, but a single machine; the users could connect via modem, leave public messages, send and read private email and swap files.
Charles Cobb had an account on a private BBS for technology collectors. The password to his account was written on the inside of his DOS manual. (PROSE: Blue Box [+]Loading...{"chapt":"65 One","1":"Blue Box (novel)"})
