Information processing; flexible disk cartridge 200 using one or two sides; electromagnetic properties at 13 262 flux transitions per rad, two-frequency recording mode or modified frequency modulation recording— 5 стр.
Information processing; flexible disk cartridge 130 using one or two sides; electromagnetic properties at 7958 flux transitions per rad, two-frequency recording mode or modified frequency modulation recording— 4 стр.
Information processing; flexible disk cartridge 90 usable on two sides; electromagnetic properties at 7958 flux transitions per rad; modified frequency modulation recording, 80 tracks per side— 4 стр.