Editing List of operating systems (section)

===IBM===
{{further|History of IBM mainframe operating systems}}

====On early mainframes: 1410, 7010, 704, 709, 7090, 7094, 7040, 7044, 7030====<!--IBM-->
* [[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 [[IBM 7090|7090]]
* [[GM-NAA I/O|GM OS & GM-NAA I/O]] – for the [[IBM 704]]
* [[IBM 7090/94 IBSYS|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]]{{citation needed|date=March 2019}}
* '''1410 Processor Operating System''' (PR-155) for the [[IBM 1410|1410]] and [[IBM 7010|7010]]
* [[SHARE Operating System]] (SOS) – for the [[IBM 704]] and [[IBM 709|709]]
* [[University of Michigan Executive System]] (UMES) – for the [[IBM 704]], [[IBM 709|709]], and [[IBM 7090|7090]])

====On S/360, S/370, and successor mainframes====<!--IBM-->
* [[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 (operating system)|MFT]] (original Multi-programming with a Fixed number of Tasks, replaced by MFT II)
*** [[MFT (operating system)|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)
*** [[Multiprogramming with a Variable number of Tasks|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 [[OS/VS2 (SVS)|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 computing|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 computing|64-bit]] virtual addressing
** [[Phoenix (computer)|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)
** [[DOS/360 and successors#TOS/360|TOS/360]] (similar to BOS above and more fleeting, able to boot and run from 2x00 series tape drives)
** [[DOS/360 and successors|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)
** [[VM (operating system)|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<ref>{{cite web
 } title     = Availability: VM/ESA Version 2 Release 1.0 with OpenEdition for VM/ESA
 | id        = 295-240
 | date      = June 12, 1995
 | series    = Announcement letters
 | url       = https://www.ibm.com/docs/en/announcements/archive/ENUS295-240
 | publisher = [[IBM]]
 | access-date = March 29, 2024
 }}
</ref> Version 2.)

** [[z/VM]] (z/Architecture version of the VM OS with 64-bit addressing). Starting with Version 3,<ref>{{cite web
 | title        = z/VM V3R1 Enabled for 64-bit Architecture
 | id           = 200-358
 | date         = October 3, 2000
 | url          = https://www.ibm.com/common/ssi/ShowDoc.wss?docURL=/common/ssi/rep_ca/8/897/ENUS200-358/index.html
 | series       = Announcement Letters
 | publisher    = [[IBM]]
 | access-date  = January 31, 2022
 | archive-date = December 17, 2021
 | archive-url  = https://web.archive.org/web/20211217151307/https://www.ibm.com/common/ssi/ShowDoc.wss?docURL=/common/ssi/rep_ca/8/897/ENUS200-358/index.html
 | url-status   = live
 }}
</ref> the Unix environment was standard.

{{further|History of CP/CMS}}
* TPF Line (Transaction Processing Facility) on IBM S/360, S/370, and successor mainframes (largely used by airlines)
** [[IBM Airline Control Program|ACP]] (Airline Control Program)
** [[Transaction Processing Facility|TPF]] (Transaction Processing Facility)
** [[z/TPF]] ([[z/Architecture]] extension)
* [[Unix-like]] on IBM S/360, S/370, and successor mainframes
** [[IBM AIX#IBM mainframes|AIX/370]] (IBM's Advanced Interactive eXecutive, a System V Unix version)
** [[IBM AIX#IBM mainframes|AIX/ESA]] (IBM's Advanced Interactive eXecutive, a System V Unix version)
** [[OpenSolaris for System z]]
** [[Amdahl UTS|UTS]] (developed by Amdahl)
** [[Linux on IBM Z]]
* Others on IBM S/360, S/370, and successor mainframes:
** [[BOS/360]] (Basic Operating System)
** [[IBM DPPX|Distributed Processing Programming Executive/370]] (DPPX/370) a port of DDPX from [[IBM 8100|8100]] to S/370.
** [[Michigan Terminal 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)<ref>{{cite conference |url=http://dl.acm.org/citation.cfm?doid=1476793.1476796 |title=RTOS: extending OS/360 for real time spaceflight control |first=J. L. |last=Johnstone |doi=10.1145/1476793.1476796 |book-title=Proceedings of the May 14–16, 1969, Spring Joint Computer Conference |isbn=9781450379021 |pages=15–27|doi-access=free }}</ref>
** [[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====<!--IBM-->
* [[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|List of operating systems#Microsoft Corporation|l1=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)
** [[ArcaOS]] (Warp 4.52 based system sold by Arca Noae, LLC)
* [[IBM 4680 OS]] version 1 to 4, a [[point of sale|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 [[IBM Personal System/2|PS/2]]
** [[IBM AIX#IBM PS/2 series|AIX]] (IBM's Advanced Interactive eXecutive, a System V Unix version)

====On other hardware platforms====<!--IBM-->
* [[IBM Series/1]]
** [[IBM Series/1#Software support|EDX]] ([[Event Driven Executive]])
** [[IBM Series/1#Software support|RPS]] (Realtime Programming System)
** [[IBM Series/1#Software support|CPS]] (Control Programming Support, subset of RPS)
** [[SerIX]] (Unix on Series/1)
* [[IBM 1130]]
** [[IBM 1130#Operating procedure|DMS]] (Disk Monitor System)
* [[IBM 1800]]
** [[IBM 1800 TSX|TSX]] (Time Sharing eXecutive)
** [[IBM 1800 MPX|MPX]] (Multi Programming eXecutive)
* [[IBM 8100]]
** [[IBM 8100 DPCX|DPCX]] (Distributed Processing Control eXecutive)
** [[IBM 8100 DPPX|DPPX]] (Distributed Processing Programming Executive)
* [[IBM System/3]]
** DMS (Disk Management System)
* [[IBM System/34]], [[IBM System/36]]
** [[System Support Program|SSP]] (System Support Program)
* [[IBM System/38]]
** [[Control Program Facility|CPF]] (Control Program Facility)
* [[IBM System/88]]
** [[Stratus VOS]] (developed by [[Stratus Technologies|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]]
** [[Academic Operating System|AOS]] (a BSD Unix version, not related to [[Data General]] AOS)
** [[IBM AIX#IBM RT PC|AIX]] (Advanced Interactive eXecutive, a System V Unix version)
* [[UNIX]] on [[IBM POWER Instruction Set Architecture|POWER ISA]], [[PowerPC]], and [[Power ISA]]
** [[IBM AIX#POWER ISA/PowerPC/Power ISA-based systems|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 Computer Systems|Sequent]], and used for IBM [[NUMA-Q]] too)