The Linux kernel identifies both serial devices and terminals as TTYs, reminiscent of the days when teleprinters were a common form of interactive human-machine interface. Early computers were primarily noninteractive, with teleprinters used by Computer Operators for troubleshooting. Punched paper tape and the teleprinter were convenient input/output mechanisms for early electronic computers, predating Morse’s popular telegraph system in the US. The development of the Baudot code simplified the transmission of alphabetic messages, preceding Murray’s tape punch for Baudot code. The Teletype Model 15 played a crucial role in military logistics during World War II. Teleprinters evolved with network systems like Telex and TWX, laying the groundwork for modern computer networking.
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