Microsoft Operating System

 

  • Xenix (licensed version of Unix; licensed to SCO in 1987)
  • MSX-DOS (developed by MS Japan for the MSX 8-bit computer)
  • MS-DOS (developed jointly with IBM, versions 1.0–6.22)
  • Windows CE (OS for handhelds, embedded devices, and real-time applications that is similar to other versions of Windows)
    • Windows CE 3.0
    • Windows Mobile (based on Windows CE, but for a smaller form factor)
    • Windows CE 5.0
    • Windows CE 6.0
    • Windows Mobile 5.0
    • Windows Mobile 6.0
    • Windows Mobile 6.1
    • Windows Mobile 6.5
  • DOS-based Windows
    • Windows 1.0 (Windows 1)
    • Windows 2.0 (Windows 2)
    • Windows 3.0 (Windows 3 - Is the first version of Windows to make substantial commercial impact)
    • Windows 3.1x (Windows 3.1)
    • Windows 3.2 (Chinese-only release)
  • Windows 9x (Windows 4 Series) family
    • Windows 95 (Windows 4) (codename: Chicago)
    • Windows 98 (Windows 4.1) (codename: Memphis)
    • Windows Millennium Edition (Windows Me -