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BS 6958-1:1988 Guide to construction and use of 90 mm (3.5 in) flexible disk cartridges for data interchange, using modified frequency modulation recording at 7958 ftprad, 5.3 tpmm (135 tpi) on 80 tracks on each side. Dimensional, physical and magnetic characteristics
standard by BSI Group, 09/30/1988
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Provides guidance on the characteristics of the cartridge so as to provide physical interchangeability between data processing systems.Cross References:
BS 0:Part 3
BS 1449:Part 2
BS 6542:Part 2
BS 6958:Part 2
ISO 8860-2