PCBoard
PCBoard was a popular bulletin board system (BBS) program in the 1980s and 1990s. Unlike some others (e.g., Fido BBS and Opus-CBCS), it was not free to use, but was commercial software that needed to be purchased and licensed for its intended use, with licensing fees increasing with the number of phone lines of the BBS. It was considered a high-end BBS program suited for professionally run BBSs. The final released version was version 15.3 in 1996, with a beta version of 15.4 coming out in 1997; like most BBS-related things, the widespread use of the Internet in the late 1990s put an end to it.
A format of text-based graphics similar to ANSI Art was used with PCBoard, with a .pcb extension. Finding documentation on this and other aspects of the PCBoard software is difficult, since searches on "PC Board" or "PCB" tend to give lots of results pertaining to printed circuit boards.
