A bulletin board system or BBS is a computer system running software that allows users to dial into the system over a phone line and, using a terminal program, perform functions such as downloading software and data, uploading data, reading news, and exchanging messages with other users. During their heyday (from the late 1970s to the late 1990s), many BBSes were run as a hobby free of charge by the "SysOp" (system operator), while other BBSes charged their users a subscription fee for access.

Bulletin board systems were in many ways a precursor to the modern form of the World Wide Web and other aspects of the Internet. BBSes were a highly social phenomenon and were used for meeting people and having discussions in message boards as well as for publishing articles, downloading software, playing games and many more things using a single application. The BBS was also a local phenomenon, as one had to dial into a BBS with a phone line and would have to pay long distance charges for a BBS out of the local area. Thus, many users of a BBS lived in the same area and it was common for them to hold a BBS Meet, where everyone from the same board would gather and meet face to face.

Some BBSes, called elite boards, were exclusively used for distributing pirated software. These BBSes often had multiple modems and phone lines, allowing several users to upload and download files at once. Most elite BBSes used some form of new user verification, where new users would have to apply for membership and attempt to prove that they weren't a law enforcement officer or a lamer. The largest elite boards accepted users by invitation only. Quoted from Wikipedia