Unrecorded Magnetic Tape for Information Interchange (9 Track-200 and 800 CPI, NRZI and 1600 CPI, PE)* (Proposed American National Standard) CACM November, 1970 input-output, magnetic tape, information interchange, measurement, instrumentation, phase encoded recording 2.49 6.35 CA701108 JB February 9, 1978 4:42 PM 1970 5 1970 1970 5 1970 1970 5 1970