Teletypewriter Group

The Teletypewriter Group is a subset of the supply class Teletype and Facsimile Equipment, which belongs to the supply group Communication, Detection, and Coherent Radiation Equipment. Teletypewriters, also known as teleprinters or TTYs, are devices used for sending and receiving typed messages over long distances. They were commonly used for telecommunication purposes before the advent of modern computer systems. Teletypewriters typically consist of a keyboard for inputting text, a printer for producing hard copies of the messages, and a modem for transmitting and receiving data over telecommunication lines.