===
Acorn Computers=== •
Arthur •
ARX •
MOS •
RISC iX •
RISC OS ===
Amazon=== •
Fire OS Amiga Inc. •
AmigaOS •
AmigaOS 1.0-3.9 (Motorola 68000) •
AmigaOS 4 (PowerPC) •
Amiga Unix (a.k.a. Amix) ===
Amstrad=== •
AMSDOS •
Contiki •
CP/M 2.2 •
CP/M Plus •
SymbOS ===
Apple=== •
Apple II •
Apple DOS •
Apple Pascal •
ProDOS •
GS/OS •
GNO/ME •
Contiki •
Apple III •
Apple SOS •
Apple Lisa •
Mac •
Classic Mac OS •
A/UX (
UNIX System V with
BSD extensions) •
Copland •
MkLinux •
Pink •
Rhapsody •
macOS (formerly Mac OS X and OS X) •
macOS Server (formerly Mac OS X Server and OS X Server) •
Apple Network Server •
IBM AIX (Apple-customized) •
Apple MessagePad •
Newton OS •
iPhone and
iPod Touch •
iOS (formerly iPhone OS) •
iPad •
iPadOS •
Apple Watch •
watchOS •
Apple TV •
tvOS • Embedded operating systems •
bridgeOS •
Apple Vision Pro •
visionOS • Embedded operating systems •
A/ROSE •
iPod software (unnamed embedded OS for
iPod) • Unnamed
NetBSD variant for
Airport Extreme and
Time Capsule ===
Apollo Computer,
Hewlett-Packard=== •
Domain/OS – One of the first network-based systems. Run on
Apollo/Domain hardware. Later bought by
Hewlett-Packard. ===
Atari=== •
Atari DOS (for 8-bit computers) •
Atari TOS •
Atari MultiTOS •
Contiki (for 8-bit, ST, Portfolio) ===
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=== •
Unix ("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 •
Inferno ===
Burroughs Corporation,
Unisys=== •
Burroughs MCP ===
CII=== •
Siris 8 ===
Commodore International=== •
GEOS •
AmigaOS •
AROS Research Operating System ===
Control Data Corporation===
Lower 3000 series •
SCOPE (Supervisory Control Of Program Execution)
Upper 3000 series •
SCOPE (Supervisory Control Of Program Execution) • Drum SCOPE
6x00 and related Cyber •
Chippewa Operating System (COS) • MACE (Mansfield and Cahlander Executive) •
Kronos (Kronographic OS) •
NOS (Network Operating System) •
NOS/VE (NOS Virtual Environment) •
SCOPE (Supervisory Control Of Program Execution) • NOS/BE NOS Batch Environment • SIPROS (Simultaneous Processing Operating System)
Star-100 Multiple Console Time Sharing System (MCTS), from General Motors Research ===
CloudMosa=== •
Puffin OS ===
Convergent Technologies=== •
Convergent Technologies Operating System (CTOS) – later acquired by
Unisys ===
Cromemco=== •
Cromemco DOS (CDOS) – a Disk Operating system compatible with
CP/M •
Cromix – a multitasking, multi-user,
Unix-like OS for
Cromemco microcomputers with
Z80A and/or
68000 CPU ===
Data General=== •
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 •
RDOS Real-time Disk Operating System, with variants: RTOS and DOS (not related to
PC DOS,
MS-DOS etc.) ===
Datapoint=== • CTOS Cassette Tape Operating System for the
Datapoint 2200 • DOS Disk Operating System for the Datapoint 2200, 5500, and 1100 ===
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 CP/M for
Intel 8080/
8085 and
Zilog Z80 •
Personal CP/M, a refinement of CP/M •
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 •
DOS •
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 •
Toshiba 4690 OS, a POS operating system based on IBM 4690 OS and FlexOS •
FlexOS 386, a later variant of FlexOS for hosts •
IBM 4690 OS, a POS operating system based on FlexOS •
Toshiba 4690 OS, a POS operating system based on IBM 4690 OS and 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 1.1 – 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 Equipment Corporation,
Compaq,
Hewlett-Packard,
Hewlett Packard Enterprise=== •
Batch-11/DOS-11 •
OS/8 •
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 •
TOPS-10 – for the PDP-10 •
TENEX – an ancestor of
TOPS-20 from
BBN, for the PDP-10 •
TOPS-20 – for the PDP-10 •
DEC MICA – for the
DEC PRISM •
Digital UNIX – derived from OSF/1, became HP's
Tru64 UNIX •
Ultrix •
VMS – originally by
DEC (now by VMS Software Inc.) for the
VAX mini-computer range; later renamed OpenVMS and ported to
Alpha, and subsequently ported to Intel
Itanium and then to
x86-64 •
WAITS – for the PDP-6 and PDP-10 ===
ENEA AB=== •
OSE – Flexible, small footprint, high-performance RTOS for control processors ===
Fujitsu=== •
Towns OS • XSP •
OS/IV •
MSP •
MSP-EX ===
GEC Computers=== • COS • DOS •
OS4000 ===
General Electric,
Honeywell,
Bull=== •
Real-Time Multiprogramming Operating System •
GCOS •
Multics ===
Google=== on the
Samsung Galaxy Z smartphones •
ChromiumOS is an open source operating system development version of ChromeOS. Both operating systems are based on the
Linux kernel. •
ChromeOS is designed to work exclusively with web applications, though has been updated to run Android apps with full support for Google Play Store. Announced on July 7, 2009, ChromeOS is currently publicly available and was released summer 2011. The ChromeOS source code was released on November 19, 2009, under the BSD license as ChromiumOS. •
Container-Optimized OS (COS) is an operating system that is optimized for running Docker containers, based on
ChromiumOS. •
Android is an operating system for mobile devices. It consists of
Android Runtime (userland) with Linux (kernel), with its Linux kernel modified to add drivers for mobile device hardware and to remove unused Vanilla Linux drivers. •
gLinux, a Linux distribution that Google uses internally •
Fuchsia is a
capability-based real-time operating system (RTOS)
scalable to universal devices, in early development, from the tiniest
embedded hardware,
wristwatches, tablets to the largest personal computers. Unlike ChromeOS and Android, it is not based on the Linux kernel, but instead began on a new microkernel called "Zircon", derived from "Little Kernel". •
Wear OS a version of
Google's
Android operating system designed for
smartwatches and other
wearables. ===
Green Hills Software=== •
INTEGRITY – Reliable Operating system •
INTEGRITY-178B – A DO-178B certified version of
INTEGRITY. •
μ-velOSity – A lightweight
microkernel. ===
Harris Computer Systems === •
Vulcan O/S – Proprietary O/S for
Harris Computer Systems (HCX) •
CX/UX – Proprietary UNIX based OS for Harris' computers (MCX) ===
Heathkit,
Zenith Data Systems=== •
HDOS – ran on the
H8 and Heath/
Zenith Z-89 series •
HT-11 – a modified version of
RT-11 that ran on the
Heathkit H11 ===
Hewlett-Packard,
Hewlett Packard Enterprise=== •
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=== •
CP-6, CP-V work-alike for Honeywell Level/66 ===
Huawei=== •
HarmonyOS •
HarmonyOS NEXT •
LiteOS •
EulerOS ===
Intel Corporation=== •
iRMX – real-time operating system originally created to support the Intel 8080 and 8086 processor families in embedded applications. •
ISIS,
ISIS-II – "Intel Systems Implementation Supervisor" was an 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
PL/M, a BASIC interpreter, etc. and allowed file management through a console. •
iMAX 432 - an operating system for systems based on Intel's
iAPX 432 architecture. ===
IBM===
On early mainframes: 1410, 7010, 704, 709, 7090, 7094, 7040, 7044, 7030 •
BESYS – for the
IBM 7090 •
Compatible Time-Sharing System (CTSS) – developed at MIT's Computation Center for use on a modified
IBM 7094 •
FORTRAN Monitor System (FMS) – for the
IBM 709 and
7090 •
GM OS & GM-NAA I/O – for the
IBM 704 •
IBSYS – tape based operating system for
IBM 7090 and
IBM 7094 •
7040/7044 Operating System (16/32K) - 7040-PR-150 •
IJMON – A bootable serial I/O monitor for loading programs for the
IBM 1400 series •
1410 Processor Operating System (PR-155) for the
1410 and
7010 •
SHARE Operating System (SOS) – for the
IBM 704 and
709 •
University of Michigan Executive System (UMES) – for the
IBM 704,
709, and
7090)
On 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) • 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 with a Variable number of Tasks, had up to 15 application regions defined dynamically, plus additional regions for system tasks) •
M65MP (MVT with support for a multiprocessor 360/65) •
OS/VS (port of OS/360 targeted for the
System/370 virtual memory architecture (OS/370 is not the correct name for OS/VS1 and OS/VS2.) OS/VS has the following variations: •
OS/VS1 (Operating System/Virtual Storage 1, Virtual-memory version of OS/360 MFT II) •
OS/VS1 Basic Programming Extensions (BPE) adds device support and VM handshaking • OS/VS2 (Operating System/Virtual Storage 2, Virtual-memory version of OS/360 MVT) • OS/VS2 R1 (Called
Single Virtual Storage (SVS), Virtual-memory version of OS/360 MVT but without multiprocessing support) • OS/VS2 R2 through R3.8 (called
Multiple Virtual Storage, MVS, eliminated most need for VS1). • MVS/SE (MVS System Extensions) • MVS/SP (MVS System Product) V1 •
MVS/370 refers to OS/VS2 MVS, MVS/SE and MVS/SP Version 1 •
MVS/XA (MVS/SP V2, supports S/370 Extended Architecture,
31-bit addressing) •
MVS/ESA (MVS supported Enterprise Systems Architecture, horizontal addressing extensions: data only address spaces called Dataspaces) •
MVS/SP V3 •
MVS/ESA SP V4 (a Unix environment was available for MVS/ESA SP V4R3) •
MVS/ESA SP V5 (the UNIX environment was bundled in this and all subsequent versions) •
OS/390 replacement for MVS/ESA SP V5 with some products bundled •
z/OS z/Architecture replacement for OS/390 with
64-bit virtual addressing •
Phoenix/MVS (Developed at
Cambridge University) •
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/Advanced Functions (VSE/AF) - Additional functionality for DOS/VSE •
VSE/SP (program product including DOS/VSE and VSE/AF) • VSE/ESA, replaces VSE/SP, supports ESA/370 and
ESA/390 with 31-bit addresses •
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) •
Virtual Machine Facility/370 (VM/370) - the CP
virtual machine hypervisor,
Conversational Monitor System (CMS) operating system and supporting facilities for System/370 (24-bit addresses) •
VM/370 Basic System Extensions Program Product (VM/BSE, AKA BSEPP) is an enhancement to VM/370 •
VM/370 System Extensions Program Product (VM/SE, AKA SEPP) is an enhancement to VM/370 that includes the facilities of VM/BSE •
Virtual Machine/System Product (VM/SP) replaces VM/370, VM/BSE and VM/SE. •
Virtual Machine/Extended Architecture (VM/XA) refers to three versions of VM that support System/370 Extended Architecture (S/370-XA) with 31-bit virtual addresses •
Virtual Machine/Extended architecture Migration Aid (VM/XA MA) - Intended for MVS/370 to MVS/XA migration •
Virtual Machine/Extended Architecture Systems Facility (VM/XA SF) - new release of VM/XA MA with additional functionality •
Virtual Machine/Extended Architecture System Product (VM/XA SP) - Replaces VM/SP, VM/SP HPO and VM/XA SF •
Virtual Machine/Enterprise Systems Architecture (VM/ESA), supports S/370, ESA/370 and
ESA/390 (a Unix environment was available starting with Version 2.) •
z/VM (z/Architecture version of the VM OS with 64-bit addressing). Starting with Version 3, the Unix environment was standard. • 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 •
VM/IX PRPQ (
IX/370 (
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 System z •
UTS (developed by Amdahl) •
Linux on IBM Z • Others on IBM S/360, S/370, and successor mainframes: •
BOS/360 (Basic Operating System) •
Distributed Processing Programming Executive/370 (DPPX/370) a port of DDPX from
8100 to S/370. •
MTS (Michigan Terminal System, developed by a group of universities in the US, Canada, and the UK for the IBM System/360 Model 67, System/370 series, and compatible mainframes) • 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) •
TSS/370 PRPQ (IBM's Time Sharing System ported to S/370) •
MUSIC/SP (developed by
McGill University for IBM System/370) •
ORVYL and WYLBUR (developed by
Stanford University for IBM System/360)
On 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 •
OS/2 • OS/2 1.x (developed jointly with Microsoft) • OS/2 2.x •
OS/2 Warp 3 (ported to PPC via
Workplace OS) •
OS/2 Warp 4 •
eComStation (Warp 4.5/Workspace on Demand, rebundled by Serenity Systems International) •
ArcaOS (Warp 4.52 based system sold by Arca Noae, LLC) •
IBM 4680 OS version 1 to 4, a
POS operating system based on
Digital Research's
Concurrent DOS 286 and
FlexOS 286 1.xx •
IBM 4690 OS version 1 to 6.3, a successor to 4680 OS based on
Novell's
FlexOS 286/
FlexOS 386 2.3x •
Toshiba 4690 OS version 6.4, a successor to 4690 OS 6.3 •
Unix-like on
PS/2 •
AIX (IBM's Advanced Interactive eXecutive, a System V Unix version)
On other 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) •
IBM AS/400, iSeries, System i,
IBM Power Systems •
IBM i (previously known as OS/400 and i5/OS, descendant of System/38 CPF, includes System/36 SSP and AIX environment) •
UNIX on
IBM RT PC •
AOS (a BSD Unix version, not related to
Data General AOS) •
AIX (Advanced Interactive eXecutive, a System V Unix version) •
UNIX on
POWER ISA,
PowerPC, and
Power ISA •
AIX (Advanced Interactive eXecutive, a System V Unix version) • Others •
Workplace OS (a
microkernel based operating system including OS/2, developed and canceled in the 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 •
Edinburgh Multiple Access System (EMAS) for the
ICL System 4/75, from the
University of Edinburgh, later ported to other systems. •
Executive – used on the 1900 and 290x range of minicomputers. A modified version of Executive was also used as part of GEORGE 3 and 4. •
TME – used on the ME29 minicomputer •
ICL VME – including early variants VME/B and VME/2900, appearing on the
ICL 2900 Series and Series 39 mainframes, implemented in
S3 •
VME/K – on early smaller 2900s
Jide •
Remix OS ===
Jolla=== •
Sailfish OS ===
KaiOS=== •
KaiOS Lynx Real-time Systems, LynuxWorks, Lynx Software Technologies •
LynxOS Meizu •
Flyme OS ===
Microsoft Corporation=== •
Xenix (licensed version of Unix; licensed to
SCO in 1987) •
MS-DOS (developed jointly with IBM, versions 1.0–6.22) •
Z-DOS •
MS-Net •
MS-DOS 4.0 (multitasking) •
MS-DOS 7 •
MSX-DOS (developed by MS Japan for the MSX 8-bit computer) •
DOS/V •
OS/2 1.x (developed jointly with IBM until version 1.3) •
LAN Manager •
Windows (16-bit and 32-bit preemptive and cooperative multitasking, running atop MS-DOS) •
Windows 1.0 (Windows 1) •
Windows 2.0 (Windows 2 – separate version for i386 processor) •
Windows 2.1 (Windows/286, Windows/386) •
Windows 3.0 (Windows 3) •
Windows 3.1x (Windows 3.1) •
Windows for Workgroups 3.1 (Codename Snowball) •
Windows 3.2 (Chinese-only release) •
Windows for Workgroups 3.11 •
Windows 95 (codename Chicago – Windows 4.0) •
Windows 98 (codename Memphis – Windows 4.1) •
Windows Millennium Edition (Windows ME – Windows 4.9) •
Windows NT (Full 32-bit or 64-bit kernel, not dependent on MS-DOS) •
Windows NT 3.1 •
Windows NT 3.5 •
Windows NT 3.51 •
Windows NT 4.0 •
Windows 2000 (Windows NT 5.0) •
Windows XP (Windows NT 5.1) •
Windows Server 2003 (Windows NT 5.2) •
Windows Fundamentals for Legacy PCs (based on Windows XP) •
Windows Vista (Windows NT 6.0) •
Windows Azure (Cloud OS Platform) 2009 •
Windows Home Server (based on Windows Server 2003) •
Windows Server 2008 (based on Windows Vista) •
Windows 7 (Windows NT 6.1) •
Windows Server 2008 R2 (based on Windows 7) •
Windows Home Server 2011 (based on Windows Server 2008 R2) •
Windows 8 (Windows NT 6.2) •
Windows RT •
Windows Phone 8 •
Windows Server 2012 (based on Windows 8) •
Windows 8.1 (Windows NT 6.3) •
Windows Phone 8.1 •
Windows Server 2012 R2 (based on Windows 8.1) •
Windows 10 (Windows NT 10.0) •
Windows 10 Mobile •
Windows Server 2016 •
Windows Server 2019 •
Windows 11 (Windows NT 10.0) •
Windows Server 2022 •
Windows Server 2025 •
Windows CE (OS for handhelds, embedded devices, and real-time applications that is similar to other versions of Windows) •
Windows CE 3.0 •
Windows CE 5.0 •
Windows Embedded CE 6.0 •
Windows Embedded Compact 7 •
Windows Embedded Compact 2013 •
Windows Mobile (based on Windows CE, but for a smaller form factor) •
Windows Phone 7 •
KIN OS •
Xbox system software •
Xbox (first generation) system software •
Xbox 360 system software •
Xbox One system software •
Xbox Series X/S system software •
Singularity – A research operating system written mostly in
managed code (
C#) •
Midori – A managed code operating system •
SONiC •
Azure Sphere •
CBL-Mariner MITS •
Altair DOS – An early disk operating system for the
Altair 8800 machine. ===
MontaVista=== • MontaVista
Mobilinux ===
Motorola=== •
VERSAdos ===
NCR Corporation=== •
TMX – Transaction Management eXecutive. •
IMOS – Interactive Multiprogramming Operating System (circa 1978), for the NCR Century 8200 series minicomputers. •
VRX – Virtual Resource eXecutive. ===
NeXT=== •
NeXTSTEP ===
Nintendo=== •
ES – a computer operating system developed originally by Nintendo and since 2008 by Esrille. It is open source and runs natively on x86 platforms. •
Nintendo DSi system software •
Wii system software •
Nintendo 3DS system software •
Wii U system software •
Nintendo Switch system software ===
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. •
UnixWare •
Novell "SuperNOS" – a never released merge of NetWare and UnixWare •
Novell "Corsair" •
Novell "Exposé" •
Open Enterprise Server – the successor to NetWare
Open Mobile Platform •
Aurora OS – the successor to Sailfish OS (not to be confused with a different
Aurora OS)
Quadros Systems •
RTXC Quadros RTOS – proprietary C-based RTOS used in embedded systems
RCA •
Time Sharing Operating System (TSOS) – first OS supporting virtual addressing of the main storage and support for both timeshare and batch interface
RoweBots • DSPnano RTOS – 8/16 Bit Ultra Tiny Embedded Linux Compatible RTOS ===
Samsung Electronics=== •
Bada •
Tizen is an operating system based on the Linux kernel, a project within the Linux Foundation and is governed by a Technical Steering Group (TSG) while controlled by Samsung and backed by Intel. Tizen works on a wide range of Samsung devices including smartphones, tablets, smart TVs, PCs and wearable. •
Orsay •
One UI - Android custom ROM
Scientific Data Systems (SDS) SDS 900 series •
Berkeley Timesharing System for the
SDS 940 SDS Sigma series •
Universal Time-Sharing System CP-V, CP-R •
Xerox Operating System (XOS) • GORDO from UCLA •
Ésope (operating system) from IRIA for the Sigma 7 and CII 10070
SCO, SCO Group Source: •
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 ===
Silicon Laboratories (formerly Micrium Inc.)=== •
Micrium OS - customized μC/OS-III for Silicon Laboratories's SoC products ===
Sinclair Research=== •
Sinclair BASIC was used in the 8-bit home computers from
Sinclair Research and
Timex Sinclair. It was included in the ROM, and the computers booted to the Basic interpreter. Various versions exist, with the latter ones supporting disk drive operations. ===
Sony=== •
PlayStation Vita system software •
PlayStation 3 system software •
PlayStation 4 system software •
PlayStation 5 system software ===
SYSGO=== •
PikeOS – a certified real time operating system for safety and security critical embedded systems ===
Tandem Computers,
Compaq,
Hewlett-Packard,
Hewlett Packard Enterprise=== •
NonStop OS - formerly Guardian (Tandem), then NonStop Kernel, then NonStop OS; runs on HPE's NonStop line of servers ===
Tandy Corporation=== •
TRSDOS – A floppy-disk-oriented OS supplied by Tandy/Radio Shack for their
TRS-80 Z80-based line of personal computers. Eventually renamed as LS-DOS or LDOS. •
Color BASIC – A ROM-based OS created by Microsoft for the
TRS-80 Color Computer. •
NewDos/80 – A third-party OS for Tandy's TRS-80 personal computers. •
DeskMate – Operating system created by Tandy Corporation and introduced with the
Tandy 1000 computer.
TCSC (later NCSC) •
Edos – enhanced version of IBM's
DOS/360 (and later
DOS/VS and
DOS/VSE) operating system for
System/360 and
System/370 IBM mainframes
Texas Instruments •
TI-RTOS Kernel – Real-time operating system for TI's embedded devices.
TRON Project •
TRON – open
real-time operating system kernel •
T-Kernel UNIVAC, Unisys •
EXEC I •
EXEC II •
EXEC 8/OS 1100/
OS 2200 •
VS/9, successor to
RCA TSOS •
OS/4 for 9000 series
Valve •
SteamOS 1.0 & 2.0 - a
Debian-based operating system for
Steam Machine and x86-64PCs •
SteamOS 3.0 - an
Arch Linux-based operating system for
Handheld gaming PCs
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.
Weston Embedded Solutions •
μC/OS-II – a small pre-emptive priority based multi-tasking kernel •
μC/OS-III – a small pre-emptive priority based multi-tasking kernel, with unlimited number of tasks and priorities, and round-robin scheduling •
Cesium RTOS - commercial continuation of Micrium's μC/OS-III forked from the open-sources release
Wind River Systems •
VxWorks – Small footprint, scalable, high-performance RTOS for embedded microprocessor based systems.
Zilog •
Z80-RIO Other Lisp-based •
Lisp Machines, Inc. (also known as LMI) used an operating system written in
MIT's
Lisp Machine Lisp. •
Symbolics Genera written in a systems dialect of the
Lisp programming language called
ZetaLisp and Symbolics
Common Lisp. Genera was ported to a virtual machine for the
DEC Alpha line of computers. •
Texas Instruments' Explorer
Lisp machine workstations also had systems code written in
Lisp Machine Lisp. •
Xerox 1100 series of Lisp machines used an operating system also written in
Interlisp, and was also ported to a virtual machine called "Medley."
For Elektronika BK •
ANDOS •
CSI-DOS •
MK-DOS Non-standard language-based •
Pilot operating system – written in the
Mesa language and used on
Xerox Star workstations. •
PERQ Operating System (POS) – written in PERQ
Pascal.
Other proprietary non-Unix-like • Operating system for
Эльбрус-1 (Elbrus-1) and Эльбрус-2 – used for application, job control, system programming, implemented in
uЭль-76 (AL-76). •
Business Operating System (BOS) – developed to be ported across microcomputers. •
EOS – developed by
ETA Systems for use in their
ETA-10 line of
supercomputers • EMBOS – developed by
Elxsi for use on their
mini-supercomputers •
GCOS – a proprietary operating system originally developed by
General Electric •
MAI Basic Four – An OS implementing
Business Basic from MAI Systems. •
Michigan Terminal System – Developed by a group of universities in the US, Canada, and the UK for use on the IBM System/360 Model 67, the System/370 series, and compatible mainframes •
MUSIC/SP – an operating system developed for the S/370, running normally under VM • OS ES – an operating system for
ES EVM •
PC-MOS/386 – DOS-like, but multiuser/multitasking • Prolog-Dispatcher – used to control Soviet
Buran space shuttle. •
SINTRAN III – an operating system used with
Norsk Data computers. •
SkyOS – commercial desktop OS for PCs •
SODA – used by the
Odra 1204 computers. •
THEOS •
TSX-32 – a 32-bit operating system for x86 platform. • TX990/TXDS,
DX10 and
DNOS – proprietary operating systems for
TI-990 minicomputers
Other proprietary Unix-like and POSIX-compliant •
Aegis (
Apollo Computer) •
Amiga Unix (Amiga ports of Unix System V release 3.2 with Amiga A2500UX and SVR4 with Amiga A3000UX. Started in 1990, last version was in 1992) •
ChorusOS from
INRIA •
Coherent (
Unix-like OS from Mark Williams Co. for PC class computers) •
DC/OSx (DataCenter/OSx—an operating system developed by
Pyramid Technology for its
MIPS-based systems) •
DG/UX (Data General Corp) •
DNIX from
DIAB • DSPnano RTOS (POSIX nanokernel, DSP Optimized, Open Source) •
HeliOS developed and sold by
Perihelion Software mainly for
transputer-based systems •
Interactive Unix (a
port of the
UNIX System V operating system for
Intel x86 by
Interactive Systems Corporation) •
IRIX from
SGI • MASIX from MASI laboratory (a multiserver operating system based on Mach microkernel) •
MeikOS •
NeXTSTEP (developed by
NeXT; a Unix-based OS based on the
Mach microkernel) •
OS-9 Unix-like RTOS. (OS from
Microware for
Motorola 6809 based microcomputers) • OS9/68K
Unix-like RTOS. (OS from
Microware for
Motorola 680x0 based microcomputers; based on
OS-9) •
OS-9000 Unix-like RTOS. (OS from
Microware for
Intel x86 based microcomputers; based on
OS-9, written in
C) •
OSF/1 (developed into a commercial offering by
Digital Equipment Corporation) •
OPENSTEP •
QNX (POSIX, microkernel OS; usually a real time embedded OS) • PNX, a port of UNIX v7 and System III to the PERQ computer •
Rhapsody (an early form of Mac OS X) •
RISC iX – derived from BSD 4.3, by Acorn computers, for their
ARM family of machines •
RISC/os (a port by
MIPS Technologies of
4.3BSD for its
MIPS-based computers) •
RMX •
SCO UNIX (from
SCO, bought by Caldera who renamed themselves
SCO Group) •
SINIX (a port by
SNI of
Unix to the
MIPS architecture) •
Solaris (from Sun, bought by Oracle; a System V-based replacement for SunOS) •
SunOS (BSD-based Unix system used on early Sun hardware) •
SUPER-UX (a port of
System V Release 4.2MP with features adopted from
BSD and
Linux for
NEC SX architecture supercomputers) •
System V (a release of AT&T Unix, 'SVR4' was the 4th minor release) •
System V/AT, 386 (The first version of AT&T System V UNIX on the IBM 286 and 386 PCs, ported and sold by
Microport) •
Trusted Solaris (Solaris with kernel and other enhancements to support
multilevel security) •
UniFLEX (
Unix-like OS from
TSC for DMA-capable, extended addresses, Motorola 6809 based computers; e.g.
SWTPC,
Gimix and others) •
Unicos (the version of Unix designed for Cray Supercomputers, mainly geared to vector calculations) • UTX-32 (Developed by Gould CSD (Computer System Division), a Unix-based OS that included both BSD and System V characteristics. It was one of the first Unix based systems to receive NSA's C2 security level certification.) •
Zenix, Zenith corporations Unix (a popular USA electronics maker at the time) ==Non-proprietary==