ALGOL COBOL FORTRAN alphabetic data alphanumeric code angular data assembler binary digit binary scale binary system bit bug byte command pulses commands compiler computer code computer language computer program control signals controlled quantity correcting signals data error error signals feedback pulses feedback signals film data hexadecimal system information input quantity instructions machine language message multiple messages noise numeric data octal system oscillograph data output data output quantity play polar data punch-card data random data rectangular data reference quantity ruly English signals single messages unorganized data visible-speech data