Floppy disk

See also Filesystems, which are contained on Floppy Disks.

File Format
Name	Floppy disk
Ontology	Physical File Formats Floppy disk
Some floppies, 5 1/4" and 3 1/2".

Formats for images of floppy disk data can be found at Disk Image Formats.

8 Inch

• DEC
  • DEC RX01
  • DEC RX02
• IBM
  • IBM Type 1 (33FD)
  • IBM Type 2 (43FD)
  • IBM Type 2D (53FD)
  • IBM 23FD
  • IBM 3740 format

5 1/4 Inch

• Acorn
  • Acorn single density 5 1/4" disk
  • Acorn double density 5 1/4" disk
• APF
  • APF Imagination Machine floppy disk
• Apple
  • Apple II 13 sector disk (Apple DOS 3.2)
  • Apple II 16 sector disk (Apple DOS 3.3, ProDOS, Apple III SOS)
  • Twiggy floppy (Apple Lisa)
• Atari
  • Atari 810
• CalComp
  • CalComp Vistagraphics 4500
• Commodore
  • Commodore 2040 disk (and 4040; for PET computers; preceded 1541 despite higher number)
  • Commodore 1541 disk (used with VIC-20 and C-64)
  • Commodore 1571 disk (used with C-128)
• Compucolor
  • Compucolor II disk
• IBM PC and compatible
  • PC-DOS 160K format
  • PC-DOS 180K format
  • PC-DOS 320K format
  • PC-DOS 360K format
  • PC-DOS 1.2M format
• Kaypro
  • Kaypro 2 CP/M 2.2
  • Kaypro 4 CP/M 2.2
• North Star
  • North Star MDS-A-D
• PMC
  • PMC MicroMate
• Tandy
  • TRS-80 Model I, II
    • TRS-80 single density 5.25" disk
    • TRS-80 double density 5.25" disk
  • TRS-80 Color Computer
    • TRS-80 Color Computer single density 5.25" disk
    • TRS-80 Color Computer double density 5.25" disk
• Texas Instruments
  • TI-99/4A 90K
  • TI-99/4A 180K
  • TI-99/4A 360K

3 1/2 Inch

• Acorn
  • Acorn double density 3 1/2" disk
  • Acorn high density 3 1/2" disk
• Akai Disk Format
• Amiga
  • Amiga double density disk
  • Amiga high density disk
• Apple
  • Apple double-density 3 1/2" disk
  • Apple high-density 3 1/2" disk
• Commodore
  • Commodore 1581 disk
• IBM PC and compatibles
  • PC-DOS 720K format
  • PC-DOS 1.44M format
  • PC-DOS 2.88M format
• SAM Coupé
  • SAM Coupé disk

3 Inch

• HP 3-inch disk

Data encoding formats

• FM encoding
• GCR encoding
• MFM encoding
• RLL encoding

References

• List of Floppy Disk Formats, Wikipedia.
• Michael Haardt et al's Floppy User Guide has some information on physical, magnetic, etc formats.
• Floppy drive tech info
• Device Side Data FC5025 USB 5.25" floppy controller software
• Commodore copy protection books and manuals
• Info on disk transfers between Apple II and PC/Mac
• Rescuing Floppy Disks (Archive Team)
• Care of diskettes
• Floppy disk archaeology lecture (video)
• Dealing with difficult disks and drives
• XFER STN (New Museum) (available to artists for converting old-format works)
• PC-Lect, program to read old disk formats (for PC/MS-DOS; doesn't work in Windows past Win98)
• New, Improved Obamacare Program Released On 35 Floppy Disks (The Onion; humor)

See also Disk Imaging Software & Systems.