Editing List of operating systems (section)

===Other===
====Lisp-based====
* [[Lisp Machines|Lisp Machines, Inc.]] (also known as LMI) used an operating system written in [[MIT]]'s [[Lisp Machine Lisp]].
* [[Symbolics]] [[Genera (operating system)|Genera]] written in a systems dialect of the [[Lisp (programming language)|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)|Pilot]] operating system – written in the [[Mesa (programming language)|Mesa]] language and used on [[Xerox Star]] workstations.
* [[PERQ]] Operating System (POS) – written in PERQ [[Pascal (programming language)|Pascal]].

====Other proprietary non-Unix-like====
* Operating system for [[Elbrus (computer)|Эльбрус-1 (Elbrus-1)]] and Эльбрус-2 – used for application, job control, system programming,<ref>{{cite web|url=http://www.ixbt.com/cpu/e2k-spec.html |title=Эльбрус Бабаяна и Pentium Пентковского |publisher=Ixbt.com |access-date=2013-09-21}}</ref>  implemented in [[AL-76 programming language|uЭль-76 (AL-76)]].
* [[Business Operating System (software)|Business Operating System]] (BOS) – developed to be ported across microcomputers.
* [[EOS (operating system)|EOS]] – developed by [[ETA Systems]] for use in their [[ETA-10]] line of [[supercomputer]]s
* EMBOS – developed by [[Elxsi]] for use on their [[mini-supercomputer]]s
* [[General Comprehensive Operating System|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 (spacecraft)|Buran]] space shuttle.
* [[SINTRAN III]] – an operating system used with [[Norsk Data]] computers.
* [[SkyOS]] – commercial desktop OS for PCs
* [[SODA (operating system)|SODA]] – used by the [[Odra (computer)|Odra 1204]] computers.<ref>{{cite journal|title=SODA—A Dual Activity Operating System|author=Władysław M. Turski|journal=[[The Computer Journal]]|year=1968|volume=11|issue=2|pages=148–156|doi=10.1093/comjnl/11.2.148|doi-access=free}}</ref>
* [[THEOS]]
* [[TSX-32]] – a 32-bit operating system for x86 platform.
* TX990/TXDS, [[DX10]] and [[TI-DNOS|DNOS]] – proprietary operating systems for [[TI-990]] minicomputers

====Other proprietary Unix-like and POSIX-compliant====
* [[Domain/OS|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)
* [[Coherent (operating system)|Coherent]] ([[Unix-like]] OS from Mark Williams Co. for PC class computers)
* [[DC/OSx]] (DataCenter/OSx&mdash;an operating system developed by [[Pyramid Technology]] for its [[MIPS architecture|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 [[porting|port]] of the [[UNIX System V]] [[operating system]] for [[x86|Intel x86]] by [[Interactive Systems Corporation]])
* [[IRIX]] from [[Silicon Graphics|SGI]]
* [[MeikOS]]
* [[NeXTSTEP]] (developed by [[NeXT]]; a Unix-based OS based on the [[Mach (kernel)|Mach]] microkernel)
* [[OS-9]] [[Unix-like]] [[Real-time operating system|RTOS]]. (OS from [[Microware]] for [[Motorola 6809]] based microcomputers)
* OS9/68K [[Unix-like]] [[Real-time operating system|RTOS]]. (OS from [[Microware]] for [[Motorola 68000 series|Motorola 680x0]] based microcomputers; based on [[OS-9]])
* [[OS-9000]] [[Unix-like]] [[Real-time operating system|RTOS]]. (OS from [[Microware]] for [[Intel]] x86 based microcomputers; based on [[OS-9]], written in [[C (programming language)|C]])
* [[OSF/1]] (developed into a commercial offering by [[Digital Equipment Corporation]])
* [[OPENSTEP]]
* [[QNX]] (POSIX, microkernel OS; usually a real time embedded OS)
* [[Rhapsody (operating system)|Rhapsody]] (an early form of Mac OS X)
* [[RISC iX]] – derived from BSD 4.3, by Acorn computers, for their [[ARM architecture|ARM]] family of machines
* [[MIPS RISC/os|RISC/os]] (a port by [[MIPS Technologies]] of [[4.3BSD]] for its [[MIPS architecture|MIPS]]-based computers)
* [[RMX (operating system)|RMX]]
* [[SCO UNIX]] (from [[Santa Cruz Operation|SCO]], bought by Caldera who renamed themselves [[SCO Group]])
* [[SINIX]] (a port by [[Siemens Nixdorf Informationssysteme|SNI]] of [[Unix]] to the [[MIPS architecture]])
* [[Solaris (operating system)|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 [[UNIX System V|System V Release 4.2MP]] with features adopted from [[Berkeley Software Distribution|BSD]] and [[Linux]] for [[NEC SX architecture]] [[supercomputer]]s)
* [[UNIX System V|System V]] (a release of AT&T Unix, 'SVR4' was the 4th minor release)
* [[Microport (software)|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 (software)|Microport]])
* [[Trusted Solaris]] (Solaris with kernel and other enhancements to support [[multilevel security]])
* [[UniFLEX]] ([[Unix-like]] OS from [[Technical Systems Consultants|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.){{Citation needed|date=April 2019}}
* [[Zenix]], Zenith corporations Unix (a popular USA electronics maker at the time){{Citation needed|date=April 2019}}