ASCII by Jason Scott / What Is BBS?

"In its most fundamental form, the BBS was simply a computer connected via a modem to a phone line. On the computer was software that, when it detected that someone was calling the modem, would pick up, connect, and then provide the calling person with a menu. From this menu you could post and read messages from other users, send or receive files, or play games. What happened to BBSes, especially as it looked like they’d be around in some form forever, was multi-threaded connection to the Internet, especially Trumpet Winsock, a program that allowed PPP (Point to Point Protocol) on Windows systems."