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BS ISO/IEC 11321:1992
Information technology. 3,81 mm wide magnetic tape cartridge for information interchange. Helical scan recording. DATA/DAT format (British Standard)
Specifies the physical and magnetic characteristics and also the quality of the recorded signal, the recorded format (DATA/DAT) and the recording method, thereby allowing data interchange between drives by means of such magnetic tape cartridges.
British Standards Institution [bsi]