👉 The term "teletype" was first used in the 1920s to refer to typewriters that could be programmed and operated by telephones. These machines were often used in radio broadcasting as they allowed for immediate transmission of audio signals over long distances, much like a telemeter would transmit a signal. However, the term "teletype" was later generalized to include any machine that could be used for transmitting or receiving information through telephone lines. This includes both analog