12.1. Footprints of the Past
Terminal servers go back to the time of the first mainframes when keyboards and monitors were first introduced as I/O devices. A terminal, or "dumb terminal" as they were first called, contained little or no processing. Terminals were connected to a mainframe where processing was done by a communications hardware and software protocol that gave the terminal a node or address that data could be sent to and taken from. The bi-directional communications path was called the channel.
The first large-scale implementation of terminals was in the American Airline SABRE airline reservation system introduced in 1960. That system was upgraded to 12 IBM System/360 mainframes in 1972, which supported video terminals (VTs) all ...
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