List of known Operating Systems
I'm kind of surprised I haven't thought about adding something like this to this forum before. I found this today, and I'm not positive it's complete, though I'm pretty sure everyone who comes through here, can always check if they know of one not listed and add it in.
Nihil; If you happen to pop in, your particular experience should benefit this considering you were around for a lot more of this than a lot of people were.
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Acorn Computers
ARX
Arthur
RISC OS
MOS
Panos
RISC iX
Amiga Inc.
AmigaOS
AmigaOS 1.0-3.9 (Motorola 68000)
AmigaOS 4 (PowerPC)
Amiga Unix (aka Amix)
Apollo Computer
Domain/OS : One of the first network-based systems. Run on Apollo/Domain hardware. Later bought by Hewlett-Packard.
Apple Inc.
For Apple II
Apple DOS
UCSD Pascal
ProDOS
GS/OS
For Apple III
SOS (Sophisticated Operating System)
For Apple Lisa
Lisa OS
For Apple Newton
Newton OS
Classic Mac OS
System Software 1
System Software 2
System Software 3
System Software 4
System Software 5
System 6
System 7
For 68k CPUs
System 7 (codenamed "Big Bang")
For Intel 386 CPUs
"Star Trek" (System 7.1 running on DR DOS "StarTrek", a Novell DOS 7 precursor)
Mac OS 8
Mac OS 9
Unix-like operating systems
For Macintosh Computers
For 68k CPUs
A/UX
For PowerPC CPUs
MkLinux
Mac OS X v10.0 (aka "Cheetah")
Mac OS X v10.1 (aka "Puma")
Mac OS X v10.2 (aka "Jaguar")
Mac OS X v10.3 (aka "Panther")
For PowerPC and Intel CPUs
Mac OS X
Mac OS X v10.4 (aka "Tiger")
Mac OS X v10.5 (aka "Leopard")
For Intel CPUs
Mac OS X
Mac OS X v10.6 (aka "Snow Leopard")
Mac OS X v10.7 (aka "Lion")
Mac OS X v10.8 (aka "Mountain Lion") (From this point on it will no long be called "Mac OS X" it will be called "OS X")
Mac OS X Server
For iPhone/iPod Touch/iPad/Apple TV
iOS
Atari
Atari DOS (for 8-bit computers)
Atari TOS
Atari MultiTOS
BAE Systems
XTS-400
Be Inc.
BeOS
BeIA
BeOS r5.1d0
magnussoft ZETA (based on BeOS r5.1d0 source code, developed by yellowTAB)
Bell Labs
Unics ("Ken's new system," for its creator (Ken Thompson), officially Unics and then Unix, the prototypic operating system created in Bell Labs in 1969 that formed the basis for the Unix family of operating systems)
UNIX Time-Sharing System v1
UNIX Time-Sharing System v2
UNIX Time-Sharing System v3
UNIX Time-Sharing System v4
UNIX Time-Sharing System v5
UNIX Time-Sharing System v6
MINI-UNIX
PWB/UNIX
USG
CB Unix
UNIX Time-Sharing System v7 (It is from Version 7 Unix (and, to an extent, its descendants listed below) that almost all Unix-based and Unix-like operating systems descend.)
Unix System III
Unix System IV
Unix System V
Unix System V Releases 2.0, 3.0, 3.2, 4.0, and 4.2
UNIX Time-Sharing System v8
UNIX TIme-Sharing System v9
UNIX Time-Sharing System v10
Non-Unix Operating Systems:
BESYS
Plan 9 from Bell Labs
plan 8 from bell labs
Bull SAS
GCOS
Burroughs Corporation
Burroughs MCP
Control Data Corporation
Chippewa Operating System (COS)
SIPROS (for Simultaneous Processing Operating System)
SCOPE (Supervisory Control Of Program Execution)
MACE (Mansfield and Cahlander Executive)
Kronos (Kronographic OS)
NOS (Network Operating System)
NOS/BE NOS Batch Environment
EP/IX (Enhanced Performance Unix)
Convergent Technologies
Convergent Technologies Operating System (later acquired by Unisys)
Data General
RDOS Real-time Disk Operating System, with variants: RTOS and DOS (not related to IBM PC DOS).
AOS for 16-bit Data General Eclipse computers and AOS/VS for 32-bit (MV series) Eclipses, MP/AOS for microNOVA-based computers
DG/UX
DataPoint
CTOS Z-80 based, Cassette Tape Operating System for early desktop systems. Capable of up to 8 simultaneous users. Replaced by DataPoint DOS.
DOS Intel 808x/80x86-based, Disk Operating Systems for desktop systems. Capable of up to 32 users per node. Supported a sophisticated network of nodes that were often purpose-built. The name DOS was used in these products login screens before it was popularized by IBM, Microsoft and others.
DDC-I, Inc.
Deos Time & Space Partitioned RTOS, Certified to DO-178B, Level A since 1998
HeartOS Posix-based Hard Real-Time Operating System
Digital Research, Inc.
CP/M CP/M for Intel 8080/8085 and Zilog Z80
Personal CP/M, a refinement of CP/M 2.2 with BDOS 2.8
CP/M Plus with BDOS 3.0
CP/M-68K CP/M for Motorola 68000
CP/M-8000 CP/M for Zilog Z8000
CP/M-86 CP/M for Intel 8088/8086
CP/M-86 Plus
Personal CP/M-86
MP/M Multi-user version of CP/M-80
MP/M II
MP/M-86 Multi-user version of CP/M-86
MP/M 8-16, a dual-processor variant of MP/M for 8086 and 8080 CPUs.
Concurrent CP/M, the successor of CP/M-80 and MP/M-80
Concurrent CP/M-86, the successor of CP/M-86 and MP/M-86
Concurrent CP/M 8-16, a dual-processor variant of Concurrent CP/M for 8086 and 8080 CPUs.
Concurrent CP/M-68K, a variant for the 68000
Concurrent DOS, the successor of Concurrent CP/M-86 with PC-MODE
Concurrent PC DOS, a Concurrent DOS variant for IBM compatible PCs
Concurrent DOS 8-16, a dual-processor variant of Concurrent DOS for 8086 and 8080 CPUs.
Concurrent DOS 286
Concurrent DOS XM, a real-mode variant of Concurrent DOS with EEMS support
Concurrent DOS 386
Concurrent DOS 386/MGE, a Concurrent DOS 386 variant with advanced graphics terminal capabilities
Concurrent DOS 68K, a port of Concurrent DOS to Motorola 68000 CPUs with DOS source code portability capabilities
FlexOS 1.0 - 2.34, a derivative of Concurrent DOS 286
FlexOS 186, a variant of FlexOS for terminals
FlexOS 286, a variant of FlexOS for hosts
Siemens S5-DOS/MT, an industrial control system based on FlexOS
IBM 4680 OS, a POS operating system based on FlexOS
IBM 4690 OS, a POS operating system based on FlexOS
FlexOS 386, a later variant of FlexOS for hosts
IBM 4690 OS, a POS operating system based on FlexOS
FlexOS 68K, a derivative of Concurrent DOS 68K
Multiuser DOS, the successor of Concurrent DOS 386
CCI Multiuser DOS
Datapac Multiuser DOS
Datapac System Manager, a derivative of Datapac Multiuser DOS
IMS Multiuser DOS
IMS REAL/32, a derivative of Multiuser DOS
IMS REAL/NG, the successor of REAL/32
DOS Plus 1.2 - 2.1, a single-user, multi-tasking system derived from Concurrent DOS 4.1 - 5.0
DR DOS 3.31 - 6.0, a single-user, single-tasking native DOS derived from Concurrent DOS 6.0
Novell PalmDOS 1.0
Novell "Star Trek"
Novell DOS 7, a single-user, multi-tasking system derived from DR DOS
Caldera OpenDOS 7.01
Caldera DR-DOS 7.02 and higher
Digital/Tandem Computers/Compaq/HP
OS/8
ITS (for the PDP-6 and PDP-10)
Multi-Programming Executive (from HP)
TOPS-10 (for the PDP-10)
WAITS (for the PDP-6 and PDP-10)
TENEX (from BBN, for the PDP-10)
TOPS-20 (for the PDP-10)
RSTS/E (multi-user time-sharing OS for PDP-11s)
RSX-11 (multiuser, multitasking OS for PDP-11s)
RT-11 (single user OS for PDP-11)
VMS (originally by DEC, now by HP) for the VAX mini-computer range, Alpha and Intel Itanium 2; later renamed OpenVMS)
Domain/OS (originally Aegis, from Apollo Computer who were bought by HP)
Digital UNIX (derived from OSF/1, became HP's Tru64 UNIX)
HP-UX
Ultrix
ENEA AB
OSE Flexible, small footprint, high-performance RTOS for control processors
Fujitsu
Towns OS
Google
Google Chrome OS is designed to work exclusively with web applications. Announced on July 7, 2009, Chrome OS is currently publicly available and was released summer 2011. The Chrome OS source code was released on November 19, 2009 under the BSD license as Chromium OS.
Chromium OS is an open source operating system development version of Google Chrome OS. Both operating systems are based on the Ubuntu kernel.
Android is an operating system for mobile devices. Android is based on Linux core.
es is a computer operating system developed originally by Nintendo and since 2008 by Google. It is open source and runs natively on x86 platforms.
Green Hills Software
INTEGRITY Reliable Operating system
INTEGRITY-178B A DO-178B certified version of INTEGRITY.
µ-velOSity A lightweight microkernel.
Heathkit/Zenith Data Systems
HDOS; ran on the H8 and Heath/Zenith Z-89 series
HT-11 (a modified version of RT-11) ran on the Heathkit H11
Hewlett-Packard
HP Multi-Programming Executive; (MPE, MPE/XL, and MPE/iX) runs on HP 3000 and HP e3000 mini-computers.
HP-UX; runs on HP9000 and Itanium servers - from small to mainframe-class computers.
Honeywell
Multics
GCOS
Intel Corporation
iRMX; real-time operating system originally created to support the Intel 8080 and 8086 processor families in embedded applications.
ISIS-II; "Intel Systems Implementation Supervisor" was THE environment for development of software within the Intel microprocessor family in the early 1980s on their Intellec Microcomputer Development System and clones. ISIS-II worked with 8 inch floppy disks and had an editor, cross-assemblers, a linker, an object locator, debugger, compilers for PLM (PL/I for microprocessors of the 8080/86 family), a BASIC interpreter, etc. and allowed file management through a console.
On early IBM mainframes (1400, 1800, 701, 704, 709, 7090, and 7094)
BESYS (for the IBM 7090)
CTSS (The Compatible Time-Sharing System, developed at MIT's Computation Center for use on a modified IBM 7094)
GM OS & GM-NAA I/O (for the IBM 704)
IBSYS (tape based operating system for IBM 7090 and IBM 7094)
IJMON (A bootable serial I/O monitor for loading programs for IBM 1400 and IBM 1800)
SOS (SHARE Operating System, for the IBM 704 and 709)
UMES (University of Michigan Executive System, for the IBM 704, 709, and 7090)
On IBM S/360, S/370, and successor mainframes
OS/360 and successors on IBM S/360, S/370, and successor mainframes
OS/360 (first official OS targeted for the System/360 architecture),
Saw customer installations of the following variations:
PCP (Primary Control Program, a kernel and a ground breaking automatic space allocating file system)
MFT (original Multi-programming with a Fixed number of Tasks, replaced by MFT II)
MFT II (Multi-Programming with a Fixed number of Tasks, had up to 15 fixed size application partitions, plus partitions for system tasks, initially defined at boot time but redefinable by operator command)
MVT (Multi-Programming Variable Tasks, had up to 15 application regions defined dynamically, plus additional regions for system tasks)
OS/VS (port of OS/360 targeted for the System/370 virtual memory architecture, "OS/370" is not correct name for OS/VS1 and OS/VS2, but rather refers to OS/VS2 MVS and MVS/SP Version 1),
Customer installations in the following variations:
SVS (Single Virtual Storage, both VS1 & VS2 began as SVS systems)
OS/VS1 (Operating System/Virtual Storage 1, Virtual-memory version of MFT II)
OS/VS2 (Operating System/Virtual Storage 2, Virtual-memory version of OS/MVT but without multiprocessing support)
OS/VS2 R2 (called Multiple Virtual Storage, MVS, eliminated most need for VS1)
MVS/SE (MVS System Extensions)
MVS/SP (MVS System Product)
MVS/XA (MVS/SP V2. MVS supported eXtended Architecture, 31-bit addressing)
MVS/ESA (MVS supported Enterprise System Architecture, horizontal addressing extensions: data only address spaces called Dataspaces; a Unix environment was available starting with MVS/ESA V4R3)
OS/390 (Upgrade from MVS, with an additional Unix environment)
z/OS (OS/390 supported z/Architecture, 64-bit addressing)
DOS/360 and successors on IBM S/360, S/370, and successor mainframes
BOS/360 (early interim version of DOS/360, briefly available at a few Alpha & Beta System/360 sites)
TOS/360 (similar to BOS above and more fleeting, able to boot and run from 2x00 series tape drives)
DOS/360 (Disk Operating System (DOS), multi-programming system with up to 3 partitions, first commonly available OS for System/360)
DOS/360/RJE (DOS/360 with a control program extension that provided for the monitoring of remote job entry hardware (card reader & printer) connected by dedicated phone lines)
DOS/VS (First DOS offered on System/370 systems, provided virtual storage)
DOS/VSE (also known as VSE, upgrade of DOS/VS, up to 14 fixed size processing partitions )
VSE/SP (program product replacing DOS/VSE and VSE/AF)
VSE/ESA (DOS/VSE extended virtual memory support to 32-bit addresses (Extended System Architecture)).
z/VSE (latest version of the four decades old DOS lineage, supports 64-bit addresses, multiprocessing, multiprogramming, SNA, TCP/IP, and some virtual machine features in support of Linux workloads)
CP/CMS (Control Program/Cambridge Monitor System) and successors on IBM S/360, S/370, and successor mainframes
CP-40/CMS (for System/360 Model 40)
CP-67/CMS (for System/360 Model 67)
VM/370 (Virtual Machine / Conversational Monitor System, virtual memory operating system for System/370)
VM/XA (VM/eXtended Architecture for System/370 with extended virtual memory)
VM/ESA (Virtual Machine / Extended System Architecture, added 31-bit addressing to VM series)
z/VM (z/Architecture version of the VM OS with 64-bit addressing)
Further information: History of CP/CMS
TPF Line (Transaction Processing Facility) on IBM S/360, S/370, and successor mainframes (largely used by airlines)
ACP (Airline Control Program)
TPF (Transaction Processing Facility)
z/TPF (z/Architecture extension)
Unix-like on IBM S/360, S/370, and successor mainframes
AIX/370 (IBM's Advanced Interactive eXecutive, a System V Unix version)
AIX/ESA (IBM's Advanced Interactive eXecutive, a System V Unix version)
OpenSolaris for IBM System z
UTS (developed by Amdahl)
z/Linux
Others on IBM S/360, S/370, and successor mainframes:
BOS/360 (Basic Operating System)
MTS (Michigan Terminal System for IBM System/360)
RTOS/360 (IBM's Real Time Operating System, ran on 5 NASA custom System/360-75s)
TOS/360 (Tape Operating System)
TSS/360 (IBM's Time Sharing System)
MUSIC/SP (developed by McGill University for IBM System/370)
ORVYL and WYLBUR (developed by Stanford University for IBM System/360)
On IBM PC and Intel x86 based architectures
PC DOS / IBM DOS
PC DOS 1.x, 2.x, 3.x (developed jointly with Microsoft)
IBM DOS 4.x, 5.0 (developed jointly with Microsoft)
PC DOS 6.1, 6.3, 7, 2000, 7.10
See also: MS-DOS and Windows
OS/2
OS/2 1.x (developed jointly with Microsoft)
OS/2 2.x
OS/2 Warp 3
OS/2 Warp 4
eComStation (Warp 4.5/Workspace on Demand, rebundled by Serenity Systems International)
4680 OS version 1 to 4, a POS operating system based on Digital Research's Concurrent DOS 286 and FlexOS 286 1.xx
4690 OS version 1 to 6.2, a successor to 4680 OS based on Novell's FlexOS 286/FlexOS 386 2.3x
On other IBM hardware platforms
IBM Series/1
EDX (Event Driven Executive)
RPS (Realtime Programming System)
CPS (Control Programming Support, subset of RPS)
SerIX (Unix on Series/1)
IBM 1130
DMS (Disk Monitor System)
IBM 1800
TSX (Time Sharing eXecutive)
MPX (Multi Programming eXecutive)
IBM 8100
DPCX (Distributed Processing Control eXecutive)
DPPX (Distributed Processing Programming Executive)
IBM System/3
DMS (Disk Management System)
IBM System/34, IBM System/36
SSP (System Support Program)
IBM System/38
CPF (Control Program Facility)
IBM System/88
Stratus VOS (developed by Stratus, and used for IBM System/88, Original equipment manufacturer from Stratus)
AS/400, iSeries, System i, Power Systems i Edition
OS/400 (descendant of System/38 CPF, include System/36 SSP environment)
i5/OS (extends OS/400 with significant interoperability features)
IBM i (extends i5/OS)
UNIX on IBM POWER
AIX (Advanced Interactive eXecutive, a System V Unix version)
AOS (a BSD Unix version, not related to Data General AOS)
Others
IBM Workplace OS (Microkernel based operating system, developed and canceled in 1990s)
K42 (open-source research operating system on PowerPC or x86 based cache-coherent multiprocessor systems)
Dynix (developed by Sequent, and used for IBM NUMA-Q too)
International Computers Limited
J and MultiJob for the System 4 series mainframes
GEORGE 2/3/4 GEneral ORGanisational Environment, used by ICL 1900 series mainframes
Executive, used on the 290x range of minicomputers
TME, used on the ME29 minicomputer
ICL VME, including early variants VME/B VME/K, appearing on the ICL 2900 Series and Series 39 mainframes, implemented in S3
LynuxWorks (originally Lynx Real-time Systems)
LynxOS
Micrium Inc.
MicroC/OS-II (Small pre-emptive priority based multi-tasking kernel)
MicroC/OS-III (Small pre-emptive priority based multi-tasking kernel, with unlimited number of tasks and priorities, and round robin scheduling)
Microsoft
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 1.0 (Windows 1 - Based on Visi On) April 30, 1985
Windows 2.0 (Windows 2) December 9, 1987
Windows 3.0 (Windows 3 - Is the first version of Windows to make substantial commercial impact) May 22, 1990
Windows 3.1x (Windows 3.1) March 18, 1992
Windows 3.2 (Chinese-only release) November 19, 1992
Windows for Workgroups 3.11 January 21, 1993
Windows 95 (Windows 4) August 24, 1995
Windows 98 (Windows 4.1) June 25, 1998
Windows Millennium Edition (Windows Me - Windows 4.9) September 14, 2000
Windows NT (Full 32-bit kernel, not dependent on MS-DOS)
Windows NT 3.1 July 27, 1993
Windows NT 3.5 September 21, 1994
Windows NT 3.51 May 30, 1995
Windows NT 4.0 July 31, 1996
Windows 2000 (Windows NT 5.0), February 17, 2000
Windows XP (Windows NT 5.1) October 25, 2001
Windows Server 2003 (Windows NT 5.2) April 24, 2003
Windows Fundamentals for Legacy PCs (based on Windows XP) July 8, 2006
Windows Vista (Windows NT 6.0) January 31, 2007
Windows Azure (based on Windows Vista) 2009
Windows Home Server (based on Windows Server 2003) February 28, 2008
Windows Server 2008 (based on Windows Vista) February 28, 2008
Windows 7 (Windows NT 6.1) October 22, 2009
Windows Server 2008 R2 (based on Windows 7) October 22, 2009
Windows Home Server 2011 (based on Windows Server 2008 R2) April 6, 2011
Windows 8 Consumer Preview (First downloadable release) March 1, 2012
Windows 8 Server Beta (First downloadable release) March 15, 2012
Windows CE (OS for handhelds, embedded devices, and real-time applications that is similar to other versions of Windows) May 30, 2002
Windows CE 3.0 December 25, 2002
Windows CE 5.0 February 27, 2004
Windows CE 6.0 May 5, 2004
Windows Mobile (based on Windows CE, but for a smaller form factor) April 14, 2005
Windows Phone October 21, 2010
Singularity - A research operating system written mostly in managed code (C#) November 30, 2009
Midori - A managed code operating system July 21, 2010
Xbox and Xbox 360 OS custom operating systems May 12, 2005 and August 10, 2006
MontaVista Software
MontaVista Linux
MontaVista Mobilinux
NCR Corporation
TMX - Transaction Management eXecutive
Novell
NetWare network operating system providing high-performance network services. Has been superseded by Open Enterprise Server line, which can be based on NetWare or Linux to provide the same set of services.
Open Enterprise Server, the successor to NetWare.
Quadros Systems
RTXC Quadros RTOS proprietary C-based RTOS used in embedded systems ows
RCA
TSOS, first OS supporting virtual addressing of the main storage and support for both timeshare and batch interface
RoweBots
Unison RTOS Ultra Tiny Embedded Linux Compatible RTOS
DSPnano RTOS Ultra Tiny Embedded Linux Compatible RTOS
Unison/Reliant V3 pSOS derivative RTOS
SCO / The SCO Group[1]
Xenix, Unix System III based distribution for the Intel 8086/8088 architecture
Xenix 286, Unix System V Release 2 based distribution for the Intel 80286 architecture
Xenix 386, Unix System V Release 2 based distribution for the Intel 80386 architecture
SCO Unix, SCO UNIX System V/386 was the first volume commercial product licensed by AT&T to use the UNIX System trademark (1989). Derived from AT&T System V Release 3.2 with an infusion of Xenix device drivers and utilities plus most of the SVR4 features
SCO Open Desktop, the first 32-bit graphical user interface for UNIX Systems running on Intel processor-based computers. Based on SCO Unix
SCO OpenServer 5, AT&T UNIX System V Release 3 based
SCO OpenServer 6, SVR5 (UnixWare 7) based kernel with SCO OpenServer 5 application and binary compatibility, system administration, and user environments
UnixWare
UnixWare 2.x, based on AT&T System V Release 4.2MP
UnixWare 7, UnixWare 2 kernel plus parts of 3.2v5 (UnixWare 2 + OpenServer 5 = UnixWare 7). Referred to by SCO as SVR5
Scientific Data Systems (SDS)
Berkeley Timesharing System for the SDS 940
SYSGO
PikeOS is a certified real time operating system for safety and security critical embedded systems
TRON Project
TRON (open real-time operating system kernel)
T-Kernel
Unisys
Unisys OS 2200 operating system
UNIVAC (later Unisys)
EXEC I
EXEC II
EXEC 8 Ran on 1100 series.
VS/9, successor to RCA TSOS
Wang Laboratories
WPS Wang Word Processing System. Micro-code based system.
OIS Wang Office Information System. Successor to the WPS. Combined the WPS and VP/MVP systems.
Wind River Systems
VxWorks Small footprint, scalable, high-performance RTO
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