List of operating systems 5

Non-proprietary[edit source | editbeta]

Unix-like[edit source | editbeta]

Research Unix-like and other POSIX-compliant[edit source | editbeta]

• Minix (study OS developed by Andrew S. Tanenbaum in the Netherlands)
• Plan 9 (distributed OS developed at Bell Labs, based on original Unix design principles yet functionally different and going much further)
  • Inferno (distributed OS derived from Plan 9, originally from Bell Labs)
  • Plan B (distributed OS derived from Plan 9 and Off++ microkernel)
• Unix (OS developed at Bell Labs ca 1970 initially by Ken Thompson)
• Xinu (Study OS developed by Douglas E. Comer in the USA)

Free and open source Unix-like[edit source | editbeta]

Ubuntu, an example of a Unix-like system

• BSD (Berkeley Software Distribution, a variant of Unix for DEC VAX hardware)
  • FreeBSD (one of the outgrowths of UC Regents' abandonment of CSRG's 'BSD Unix')
    • DragonFlyBSD forked from FreeBSD 4.8
    • Darwin
  • NetBSD (one of the outgrowths of UC Regents' abandonment of CSRG's 'BSD Unix')
    • OpenBSD forked from NetBSD
  • RetroBSD ported from 2.11BSD
• GNU
• Linux (GNU Free/Open Source Operating System Software combined with the Linux kernel)

See also: List of Linux distributions

• OpenSolaris, contains original Unix (SVR4) code. Now discontinued by Oracle in favor of Solaris 11 Express
  • OpenIndiana, aims to continue development and distribution of OpenSolaris operating system. Operates under the Illumos Foundation. Uses the Illumos kernel, which is a derivative of OS/Net, which is basically a Solaris/OpenSolaris kernel with the bulk of the drivers, core libraries, and basic utilities.
  • Nexenta OS, based on the OpenSolaris kernel with Ubuntu packages
  • Jaris OS, based on OpenSolaris with support for Japanese
• RTEMS (Real-Time Executive for Multiprocessor Systems)
• Syllable Desktop
• Univention Corporate Server
• VSTa
  • FMI/OS, successor of VSTa

Other Unix-like[edit source | editbeta]

• TUNIS (University of Toronto)

Non-Unix-like[edit source | editbeta]

Research non-Unix-like[edit source | editbeta]

• Amoeba (research OS by Andrew S. Tanenbaum)
• Croquet
• HelenOS research and experimental operating system
• House Haskell User's Operating System and Environment, research OS written in Haskell and C.
• ILIOS Research OS designed for routing
• EROS microkernel, capability-based
  • CapROS microkernel EROS successor.
  • Coyotos microkernel EROS successor, goal: be first formally verified OS.
• L4 Second generation microkernel
• Mach (from OS kernel research at Carnegie Mellon University; see NeXTSTEP)
• Nemesis Cambridge University research OS - detailed quality of service abilities.
• Spring (research OS from Sun Microsystems)
• V from Stanford, early 1980s^[1]

Free and open source non-Unix-like[edit source | editbeta]

• FreeDOS (open source DOS variant)
• FreeVMS (open source VMS variant)
• Haiku (open source inspired by BeOS, under development)
• ITS written by MIT students (for the PDP-6 and PDP-10)
• MonaOS (written in C++)
• ReactOS (Windows NT-compatible OS; currently in early, but active development phase)
• Cosmos (written in C#)
• Phantom OS (persistent object oriented)
• SharpOS (written in .NET C#)
• osFree

Disk Operating Systems[edit source | editbeta]

Main article: DOS

• 86-DOS (developed at Seattle Computer Products by Tim Paterson for the new Intel 808x CPUs; licensed to Microsoft, became PC DOS/MS-DOS. Also known by its working title QDOS.)
  • PC DOS (IBM's DOS variant, developed jointly with Microsoft, versions 1.0–7.0, 2000, 7.10)
  • MS-DOS (Microsoft's DOS variant for OEM, developed jointly with IBM, versions 1.x–6.22 Microsoft's now abandoned DOS variant)
• Concurrent CP/M-86 3.1 (BDOS 3.1) with PC-MODE (Digital Research's successor of CP/M-86 and MP/M-86)
  • Concurrent DOS 3.1-4.1 (BDOS 3.1-4.1)
    • Concurrent PC DOS 3.2 (BDOS 3.2) (Concurrent DOS variant for IBM compatible PCs)
      • DOS Plus 1.2 (BDOS 4.1), 2.1 (BDOS 5.0) (single-user, multi-tasking system derived from Concurrent DOS 4.1-5.0)
    • Concurrent DOS 8-16 (dual-processor variant of Concurrent DOS for 8086 and 8080 CPUs)
    • Concurrent DOS 286 1.x
      • FlexOS 1.00-2.34 (derivative of Concurrent DOS 286)
        • FlexOS 186 (variant of FlexOS for terminals)
        • FlexOS 286 (variant of FlexOS for hosts)
          • Siemens S5-DOS/MT (industrial control system based on FlexOS)
          • IBM 4680 OS (POS operating system based on FlexOS)
          • IBM 4690 OS (POS operating system based on FlexOS)
        • FlexOS 386 (later variant of FlexOS for hosts)
          • IBM 4690 OS (POS operating system based on FlexOS)
    • Concurrent DOS 386 1.0, 1.1, 2.0, 3.0 (BDOS 5.0-6.2)
      • Concurrent DOS 386/MGE (Concurrent DOS 386 variant with advanced graphics terminal capabilities)
      • Multiuser DOS 5.0, 5.01, 5.1 (BDOS 6.3-6.6) (successor of Concurrent DOS 386)
        • CCI Multiuser DOS 5.0-7.22 (up to BDOS 6.6)
        • Datapac Multiuser DOS
          • Datapac System Manager 7 (derivative of Datapac Multiuser DOS)
        • IMS Multiuser DOS 5.1, 7.0, 7.1 (BDOS 6.6-6.7)
          • IMS REAL/32 7.50, 7.51, 7.52, 7.53, 7.54, 7.6, 7.7, 7.8, 7.90, 7.91, 7.92, 7.93, 7.94, 7.95 (BDOS 6.8 and higher) (derivative of Multiuser DOS)
            • IMS REAL/NG (successor of REAL/32)
    • Concurrent DOS XM 5.0, 5.2, 6.0, 6.2 (BDOS 5.0-6.2) (real-mode variant of Concurrent DOS with EEMS support)
      • DR DOS 3.31, 3.32, 3.33, 3.34, 3.35, 5.0, 6.0 (BDOS 6.0-7.1) single-user, single-tasking native DOS derived from Concurrent DOS 6.0)
        • Novell PalmDOS 1.0 (BDOS 7.0)
        • Novell DR DOS "StarTrek"
        • Novell DOS 7 (single-user, multi-tasking system derived from DR DOS, BDOS 7.2)
          • Novell DOS 7 updates 1-10 (BDOS 7.2)
            • Caldera OpenDOS 7.01 (BDOS 7.2)
              • Enhanced DR-DOS 7.01.0x (BDOS 7.2)
          • Novell DOS 7 updates 11-15.2 (BDOS 7.2)
            • Caldera DR-DOS 7.02-7.03 (BDOS 7.3)
              • DR-DOS "WinBolt"
              • OEM DR-DOS 7.04-7.05 (BDOS 7.3)
              • OEM DR-DOS 7.06
              • OEM DR-DOS 7.07 (BDOS 7.4/7.7)
• FreeDOS (open source DOS variant)
• ProDOS (operating system for the Apple II series computers)
• PTS-DOS (DOS variant by Russian company Phystechsoft)
• RDOS by Leif Ekblad (not to be confused with Data General Corporation's "Real-time Disk Operating System" for Data General Nova and Data General Eclipse minicomputers).
• TurboDOS (Software 2000, Inc.) for Z80 and Intel 8086 processor-based systems
• Multi-tasking user interfaces and environments for DOS
  • DESQview+ QEMM 386 multi-tasking user interface for DOS
  • DESQView/X (X-windowing GUI for DOS)

Network Operating Systems[edit source | editbeta]

Main article: Network operating system

• Cambridge Ring
• CSIRONET by (CSIRO)
• CTOS (Convergent Technologies, later acquired by Unisys)
• Data ONTAP by NetApp
• SAN-OS by Cisco (now NX-OS)
• Enterprise OS by McDATA
• ExtremeWare by Extreme Networks
• ExtremeXOS by Extreme Networks
• Fabric OS by Brocade
• NetWare (networking OS by Novell)
• NOS (developed by CDC for use in their Cyber line of supercomputers)
• Novell Open Enterprise Server (Open Source networking OS by Novell. Can incorporate either SUSE Linux or Novell NetWare as its kernel).
• Plan 9 (distributed OS developed at Bell Labs, based on Unix design principles but not functionally identical)
  • Inferno (distributed OS derived from Plan 9, originally from Bell Labs)
  • Plan B (distributed OS derived from Plan 9 and Off++ microkernel)
• TurboDOS (Software 2000, Inc.)
• JunOS by Juniper
• Cisco IOS by Cisco Systems

Web operating systems[edit source | editbeta]

Main article: Web operating system

• Chrome OS
• G.ho.st
• eyeOS
• DesktopTwo
• YouOS
• Browser OS
• Glide OS
• Joli OS