This standard provides specifications for format and recording for 1/2 inch, 9-track magnetic tape to be used for information interchange among information processing systems, communications systems, and associated equipment utilizing ANSI, X3.4-1977. This standard deals solely with recording on magnetic tape, supports and complements ANSI - Unrecorded Magnetic Tape for Information Interchange (9-Track 800 CPI, NRZI: 1600 CPI, PE; and 6250 CPI, GCR), ANSI X3.40-1983.