Windows VS Other OS

Does anyone use an operating system that is not Windows?

about this idk but i think @Doovleed can help you

GNU/Linux based OS

Acorn Computers
Arthur
ARX
MOS
RISC iX
RISC 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 Inc.
Apple II family
Apple DOS
Apple Pascal
ProDOS
GS/OS
GNO/ME
Contiki
Apple III
Apple SOS
Apple Lisa
Apple Macintosh
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, iPod Touch, iPad
iOS (formerly iPhone OS)
Apple Watch
watchOS
Apple TV
tvOS
Embedded operating systems
A/ROSE
iPod software (unnamed embedded OS for iPod)
Unnamed NetBSD variant for Airport Extreme and Time Capsule
Apollo Computer
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
Control Data Corporation
Chippewa Operating System (COS)
MACE (Mansfield and Cahlander Executive)
Kronos (Kronographic OS)
NOS (Network Operating System)
NOS/BE NOS Batch Environment
NOS/VE NOS Virtual Environment
SCOPE (Supervisory Control Of Program Execution)
SIPROS (for Simultaneous Processing Operating System)[citation needed]
EP/IX (Enhanced Performance Unix)[citation needed]
Convergent Technologies
Convergent Technologies Operating System (later acquired by Unisys)
Cromemco
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 Z-80 based, Cassette Tape Operating System for early desktop systems. Capable of up to 8 simultaneous users. Replaced by DOS.[citation needed]
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.[citation needed]
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, Tandem Computers, Compaq, Hewlett-Packard
Batch-11/DOS-11
Domain/OS (originally Aegis, from Apollo Computer who were bought by HP)
HP-UX
Multi-Programming Executive (from HP)
NonStop
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)
Digital UNIX (derived from OSF/1, became HP's Tru64 UNIX)
Ultrix
VMS (originally by DEC and HP now by VMS Software Inc.) for the VAX mini-computer range, Alpha and Intel Itanium i2 and i4; later renamed OpenVMS)
WAITS (for the PDP-6 and PDP-10)
ENEA AB
OSE – Flexible, small footprint, high-performance RTOS for control processors
Fujitsu
Towns OS
General Electric, Honeywell, Bull
Real-Time Multiprogramming Operating System
GCOS
Multics
Google

Android 4.0.1 ("Ice Cream Sandwich" on the Galaxy Nexus
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 Chrome OS. Both operating systems are based on the Linux kernel.
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.
Goobuntu, 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 Chrome OS and Android, it is not based on the Linux kernel, but instead began on a new microkernel called "Zircon", derived from "Little Kernel".
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
NonStop OS; runs on HP's NonStop line of Itanium servers
Honeywell
CP-6
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.
IBM
Further information: History of IBM mainframe operating systems
On early mainframes: 1400, 701, 704, 709, 7090, 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 the IBM 1400 series)[citation needed]
SOS (SHARE Operating System, for the IBM 704 and 709)
UMES (University of Michigan Executive System, 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 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)
Phoenix/MVS (Developed at Cambridge University)
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, 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)[1]
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 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 (ported to PPC via Workplace OS)
OS/2 Warp 4
eComStation (Warp 4.5/Workspace on Demand, rebundled by Serenity Systems International)
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)
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 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 Interactiv

I dont know what I use

[quote=Doovleed]Acorn Computers
Arthur
ARX
MOS
RISC iX
RISC 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 Inc.
Apple II family
Apple DOS
Apple Pascal
ProDOS
GS/OS
GNO/ME
Contiki
Apple III
Apple SOS
Apple Lisa
Apple Macintosh
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, iPod Touch, iPad
iOS (formerly iPhone OS)
Apple Watch
watchOS
Apple TV
tvOS
Embedded operating systems
A/ROSE
iPod software (unnamed embedded OS for iPod)
Unnamed NetBSD variant for Airport Extreme and Time Capsule
Apollo Computer
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
Control Data Corporation
Chippewa Operating System (COS)
MACE (Mansfield and Cahlander Executive)
Kronos (Kronographic OS)
NOS (Network Operating System)
NOS/BE NOS Batch Environment
NOS/VE NOS Virtual Environment
SCOPE (Supervisory Control Of Program Execution)
SIPROS (for Simultaneous Processing Operating System)[citation needed]
EP/IX (Enhanced Performance Unix)[citation needed]
Convergent Technologies
Convergent Technologies Operating System (later acquired by Unisys)
Cromemco
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 Z-80 based, Cassette Tape Operating System for early desktop systems. Capable of up to 8 simultaneous users. Replaced by DOS.[citation needed]
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.[citation needed]
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, Tandem Computers, Compaq, Hewlett-Packard
Batch-11/DOS-11
Domain/OS (originally Aegis, from Apollo Computer who were bought by HP)
HP-UX
Multi-Programming Executive (from HP)
NonStop
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)
Digital UNIX (derived from OSF/1, became HP's Tru64 UNIX)
Ultrix
VMS (originally by DEC and HP now by VMS Software Inc.) for the VAX mini-computer range, Alpha and Intel Itanium i2 and i4; later renamed OpenVMS)
WAITS (for the PDP-6 and PDP-10)
ENEA AB
OSE – Flexible, small footprint, high-performance RTOS for control processors
Fujitsu
Towns OS
General Electric, Honeywell, Bull
Real-Time Multiprogramming Operating System
GCOS
Multics
Google

Android 4.0.1 ("Ice Cream Sandwich" on the Galaxy Nexus
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 Chrome OS. Both operating systems are based on the Linux kernel.
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.
Goobuntu, 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 Chrome OS and Android, it is not based on the Linux kernel, but instead began on a new microkernel called "Zircon", derived from "Little Kernel".
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
NonStop OS; runs on HP's NonStop line of Itanium servers
Honeywell
CP-6
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.
IBM
Further information: History of IBM mainframe operating systems
On early mainframes: 1400, 701, 704, 709, 7090, 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 the IBM 1400 series)[citation needed]
SOS (SHARE Operating System, for the IBM 704 and 709)
UMES (University of Michigan Executive System, 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 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)
Phoenix/MVS (Developed at Cambridge University)
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, 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)[1]
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 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 (ported to PPC via Workplace OS)
OS/2 Warp 4
eComStation (Warp 4.5/Workspace on Demand, rebundled by Serenity Systems International)
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)
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 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 (Adv