Historical
ANSI INCITS 157-1987 (R2003)
Recorded Magnetic Tape for Information Interchange 0.5 in (12.7 mm), Tape, Nine Track, 3200 CPI (126 CPMM), Phase Encoded
This American National Standard provides specifications for format and recording for a 1/2-inch (12.7-mm), 9-track magnetic tape to be used for interchange among information processing systems, communication systems, and associated equipment utilizing a standard code for interchange as agreed upon by the interchange parties.
InterNational Committee for Information Technology Standards [incits]