Bulletin Board Systems
The computer Bulletin Board System (BBS) was the first collaborative tool available for the personal computer platform.
enables two or more computers to communicate using modems over telephone
lines. At their height in the mid-1990s, there were over 60,000 BBSs in
the United States alone. About 60 of them were operated by newspapers.
As BBSs evolved, they became more and more sophisticated. Some allowed as many as 256 users to be connected at the same time to a single computer running BBS software (a "multi-line" system). Others could handle hundreds of users but required a separate computer for every user (a "multi-node" system).