BS EN 21864:1994

Действует

Information technology. Unrecorded 12,7 mm (0,5 in) wide magnetic tape for information interchange. 32 ftpmm (800 ftpi) NRZ1, 126 ftpmm (3 200 ftpi) phase encoded and 356 ftpmm (9 042 ftpi) NRZ1 — 24 стр.