DOS versions

Source : Wikipedia.org

• MS-DOS 1.x
  • Version 1.0 (Retail)
  • Version 1.1 (Retail)
  • Version 1.12 (Retail)
  • Version 1.25 (Retail)
• MS-DOS 2.x              - Support for 10 MB Hard Disk Drives and tree-structure filing system
  • Version 2.0 (Retail)
  • Version 2.1 (Retail)
  • Version 2.11 (Retail)
  • Version 2.2 (Retail)
  • Version 2.21 (Retail)
• MS-DOS 3.x
  • Version 3.0 (Retail) - Support for larger Hard Disk Drives
  • Version 3.1 (Retail) - Support for Microsoft Networks
  • Version 3.2 (Retail)
  • Version 3.21 (Retail)
  • Version 3.25 (Retail)
  • Version 3.3 (Retail)
  • Version 3.3a (Retail)
  • Version 3.3r (Retail)
  • Version 3.31 (Retail)
  • Version 3.35 (Retail)
• MS-DOS 4.x            - includes a graphical/mouse interface.
  • Version 4.0 (Retail)
  • Version 4.01 (Retail)
• MS-DOS 5.x
  • Version 5.0 (Beta 1)
  • Version 5.0 (Retail) - includes a full-screen editor
  • Version 5.0a (Retail)
• MS-DOS 6.x
  • Version 6.0 (Retail)
  • Version 6.1 (Retail)
  • Version 6.2b (RTM)
  • Version 6.2 (Retail)
  • Version 6.21 (Retail)
  • Version 6.22 (Retail)
• MS-DOS 7.x
  • Version 7.0 (Beta)
  • Version 7.1 (Retail)