Ward Christensen coined the term "Bulletin Board System"
as a reference to the traditional cork-and-pin bulletin board often found in entrances of supermarkets, schools, libraries or other public areas where people can post messages, advertisements, or community news. By "computerizing" this method of communications, the name of the first BBS system was born: CBBS - Computerized Bulletin Board System. During their heyday from the late 1970s to the mid-1990s, most BBSes were run as a hobby free of charge by the system operator (or "SysOp"), while other BBSes charged their users a subscription fee for access, or were operated by a business as a means of supporting their customers.
Bulletin board systems were in many ways a precursor to the modern form of the World Wide Web, social network services and other aspects of the Internet.
But, I still call bullsh*t