AS 3631.1-1989

AS 3631.1-1989 Information processing systems - Data interchange on 90 mm flexible disk cartridges using modified frequency modulation recording at 7 958 ftprad on 80 tracks on each side - Dimensional, physical and magnetic characteristics
standard by Standards Australia,

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Specifies the characteristics of 90 mm flexible disk cartridges recorded at 7958 ftprad using modified frequency modulation (MFM) recording on 80 tracks on each side. It is identical to and has been reproduced from ISO Standard 8860 - Data interchange on 90 mm (3.5 in) flexible disk cartridges using modified frequency modulation recording at 7958 ftprad on 80 tracks on each side - Part 1:1987 Dimensional, physical and magnetic characteristics.