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Floppy disks were introduced in 1971 by IBM.

  1. 8-inch - IBM 23FD (read-only) - 1971 (79.7 KB)
  2. 8-inch - Memorex 650 - 1972 (175 KB)
  3. 8-inch - SSSD IBM 33FD / Shugart 901 -1973 (237.25 KB)
  4. 8-inch - DSSD IBM 43FD / Shugart 850 - 1976 (500.5 KB)
  5. 5¼-inch (35 track) Shugart SA 400 -1976 (89.6 KB)
  6. 8-inch DSDD IBM 53FD / Shugart 850 - 1977 (980 KB)
  7. 5¼-inch DD - 1978 (360 KB)
  8. 5¼-inch Apple Disk II (Pre-DOS 3.3) -1978 (113.75 KB)
  9. 5¼-inch Apple Disk II (DOS 3.3) -1980 (140 KB)
  10. 3½-inch HP single sided -1982 (280 KB)
  11. 3-inch -1982 (360 KB)
  12. 3½-inch (DD at release) - 1983 (720 KB)
  13. 5¼-inch QD - 1983 (720 KB)
  14. 5¼-inch HD - 1982 (1.2 MB)
  15. 3-inch DD - 1984 (720 KB)
  16. 3-inch Mitsumi Quick Disk - 1985 (256 KB)
  17. 2-inch - 1985 (720 KB)
  18. 2½-inch - 1986 - ?
  19. 5¼-inch Perpendicular - 1986 (10 MB)
  20. 3½-inch HD - 1987 (1.44 MB)
  21. 3½-inch ED - 1987 (2.88 MB)
  22. 3½-inch Floptical (LS) - (21 MB)
  23. 3½-inch LS-120 - 1996 (120 MB)
  24. 3½-inch LS-240 - 1997 (240 MB)
  25. 3½-inch HiFD - 1998 (200 MB)
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15y ago

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What company invented the 3.5-inch floppy disk?

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Avril Villaranda invented the floppy disk in 1978


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