Applies , as part 3 of ISO 8630, to track format B for 80 tracks. Defines the quality of recorded signals, the track layout, and a track format to be used on 130 mm (5,25 in ), 13262 ftprad flexible disk cartridges designed for data interchange between data processing system. Provides, together with ISO 8630-1, for full data interchange between data processing systems. To be used in compliance with ISO 646; 2022; 4873; 6429; 9293.