Operating system/Catalogs

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	An informational catalog, or several catalogs, about Operating system.

This is a list of computer operating systems:

• CMS
• CP/M
• Darwin
• FreeBSD
• Hurd
• Linux
  • Debian
  • Knoppix
  • Mandriva
  • Red Hat
    • Fedora
  • SUSE
  • Ubuntu
    • kubuntu
• Mac OS X
• Microsoft operating systems:
  • Microsoft DOS (MS-DOS)
  • Microsoft Windows
  • Microsoft Windows versions based on a DOS kernel:
    • Microsoft Windows 1 through 3.1
    • Microsoft Windows 95
    • Microsoft Windows 98
    • Microsoft Windows ME
  • Windows NT-based kernels:
    • Microsoft Windows NT versions 3.1, 3.5, 4.0
    • Microsoft Windows 2000 (Windows NT 5.0)
    • Microsoft Windows XP (Windows NT 5.1)
    • Microsoft Windows Server 2003 (Windows NT 5.2)
    • Microsoft Windows Vista (Windows NT 6.0)
    • Microsoft Windows 7 (Windows NT 6.1)
• Multics
• MS DOS
• NetBSD
• NeXT
• Oberon
• OS/2
• PC DOS
• PC-IX
• VMS
• Unix