DS DS/EN 28378-3
DS DSEN 28378-3 1991-JUL-09 nformaton processng - Data nterchange on 130 mm 525 n flexble dsk cartrdges usng modfed frequency modulaton recordng at 7 958 ftprad 38 tpmm 96 tp on both sdes - Part 3 Track format B
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The standard specifies the quality of recorded signals, the track layout, and a track format to be used on 130 mm (5.25 in) flexible disk cartridges intended for data interchange between data processing systems.