ATions> CommunicATion, often two-way, of spoken informATion, by means of electrical signals carried by wires or radio waves. The term was used to indicATe transmission of the voice, as distinguished from telegraphy (done in {Morse code} and usually called "{continuous wave}" or CW transmission), radio teletypewriter (RTTY) transmission (also called FSK for "Frequency Shift Keying", the modulATion scheme used by such machines), and lATer, facimile. (1995-03-14)