Editing List of operating systems (section)

==Non-proprietary==
===Unix or Unix-like===
* [[MINIX]] (study OS developed by [[Andrew S. Tanenbaum]] in the [[Netherlands]])
* [[Berkeley Software Distribution]] (BSD), a variant of Unix originally for [[Digital Equipment Corporation|DEC]] [[PDP-11]] and [[VAX]] hardware)
** [[FreeBSD]] (one of the outgrowths of UC Regents' abandonment of [[CSRG]]'s 'BSD Unix')
*** [[DragonFlyBSD]], forked from FreeBSD 4.8
*** [[MidnightBSD]], forked from FreeBSD 6.1
*** [[GhostBSD]]
*** [[TrueOS]] (previously known as PC-BSD), made for desktop/laptop usage, now discontinued
*** [https://nomadbsd.org/ NomadBSD], a project aiming to tend FreeBSD to desktop/laptop needs
** [[NetBSD]] (an embedded device BSD variant)
*** [[OpenBSD]] forked from NetBSD
**** [[Bitrig]] forked from OpenBSD, discontinued
**** FuguIta,<ref>{{Cite web |title=Welcome - FuguIta |url=https://fuguita.org/ |access-date=2022-08-10 |website=fuguita.org}}</ref> a live OpenBSD fork by a Japanese developer<ref>{{Cite web |title=DistroWatch.com: FuguIta |url=https://distrowatch.com/table.php?distribution=fuguita |access-date=2022-08-10 |website=distrowatch.com}}</ref>
** [[Darwin (operating system)|Darwin]], created by Apple using code from NeXTSTEP, FreeBSD, and NetBSD
* [[GNU]] (also known as GNU/[[GNU Hurd|Hurd]])
* [[Linux]] (see also [[List of Linux distributions]]) (alleged to be GNU/Linux<ref>{{Cite web|url=https://www.gnu.org/gnu/gnu-linux-faq.en.html|title=gnu.org|website=www.gnu.org|language=en|access-date=2018-08-24}}</ref> see [[GNU/Linux naming controversy]])
** [[Android (operating system)|Android]]<ref>{{Cite web|url=https://www.linuxfoundation.org/blog/2012/12/video-what-a-year-for-linux/|title=Video: What a Year for Linux|website=[[The Linux Foundation]]|date=2012-12-13|access-date=2020-06-30}}</ref>
*** [[Android-x86]]
**** [[Remix OS]]
*** [[EulerOS]] - Linux commercial distribution for cloud based software by [[Huawei]]
****[[EulerOS|openEuler]] - open-source community version of EulerOS
****[[EulerOS|NestOS]]  - open-source cloud based operating system based on EulerOS, contributed by openEuler community
* [[Redox (operating system)|Redox]] (written in Rust)<ref>{{cite web|url=http://www.redox-os.org/|title=Redox - Your Next(Gen) OS - Redox - Your Next(Gen) OS|website=www.redox-os.org}}</ref>
* [[OpenSolaris]]
** [[illumos]], contains original Unix (SVR4) code derived from the [[OpenSolaris]] (discontinued by Oracle in favor of [[Solaris (operating system)|Solaris]] 11 Express)
*** [[OpenIndiana]], operates under the illumos Foundation. Uses the illumos kernel, which is a derivative of [[OS/Net]], which is basically an [[OpenSolaris]]/[[Solaris (operating system)|Solaris]] kernel with the bulk of the drivers, core libraries, and basic utilities.
*** [[Nexenta OS]], based on the illumos kernel with Ubuntu packages
*** [[SmartOS]], an illumos distribution for cloud computing with [[Kernel-based Virtual Machine]] integration.
* [[RTEMS]] (Real-Time Executive for Multiprocessor Systems)
* [[Syllable Desktop]]
* [[VSTa]]
* [[Plurix]] (or Tropix<ref>{{Cite web|url=http://www.tropix.nce.ufrj.br/|title=TROPIX: Distribuição e Instalação|website=www.tropix.nce.ufrj.br|access-date=2018-08-24}}</ref>) (by [[Federal University of Rio de Janeiro]] – UFRJ)
* [[TUNIS]] (University of Toronto)
*[[Xv6]] - a simple Unix-like teaching operating system from MIT
*[[SerenityOS]] - aims to be a modern Unix-like operating system, yet with a look and feel that emulates 1990s operating systems such as [[Microsoft Windows]] and the [[classic Mac OS]].

===Non-Unix===
* [[Cosmos (operating system)|Cosmos]] – written in C#
* [[EmuTOS]] - open source [[Atari TOS]] variant
* [[FreeDOS]] – open source [[MS-DOS]] variant
* [[Genode]] – operating system framework for microkernels (written in C++)
* [[Fuchsia (operating system)|Google Fuchsia]]
* [[Haiku (operating system)|Haiku]] – open source inspired by [[BeOS]], in development
* [[Incompatible Timesharing System]] (ITS) – written in the MIDAS [[macro assembler]] language for the [[PDP-6]] and [[PDP-10]]<ref>{{cite web|url=http://www.bitsavers.org/pdf/mit/ai/aim/AIM-161A.pdf|title=ITS 1.5 Reference Manual|page=6|date=July 1969}}</ref> by [[Massachusetts Institute of Technology|MIT]] students
* [[LiteOS]]
* [[MagiC]] - open source [[Atari TOS]] variant
* [[OpenHarmony]] - LiteOS kernel and kernel add-ons side of the kernel tree under Kernel Abstract Layer (KAL) structure
* [[OpenHarmony|Uniproton]] real-time operating system for ultra-low latency and adaptable mixed-critical deployment capabilities contributed by [[EulerOS|openEuler]] community and also part of OpenHarmony add-on kernel
* [[OS/2#Future|osFree]] – OS/2 Warp open source clone
* [[OSv]] – written in C++
* [[Phantom OS]] – persistent object-oriented
* [[ReactOS]] – open source OS designed to be binary compatible with [[Windows NT]] and its variants ([[Windows XP]], [[Windows 2000]], etc.); in development
* [[SharpOS]] – written in .NET C#
* [[Visopsys]] – written in C and assembly by Andy McLaughlin
* [[Quantix]]