Wire (1898) • Tape (1928) • Drum (1932) • Ferrite core (1949) • Hard disk (1956) • Stripe card (1956) • MICR (1956) • Thin film (1962) • CRAM (1962) • Twistor (~1968) • Floppy disk (1969) • Bubble (~1970) • MRAM (1995) • Racetrack (2008)