Giant List of Operating Systems
Tags: tutorials
Published: 2019-07-30 08:10:03

---
title: Giant List of Operating Systems
published: true
tags: Tutorials
canonical_url: https://vuild.com/operating-systems
---

The majority of the world uses a default or big tech operating systems, but there are many alternatives out there which may be a better choice. Take a look through our list & see if there is something you like the look of.

[Download as PDF](https://vuild.com/operating-systems?pdf=1)
1. 2K   
[https://dl.acm.org/citation.cfm?id=871061](https://dl.acm.org/citation.cfm?id=871061)
2. 4690 Operating System   
[https://www.toshibacommerce.com](https://www.toshibacommerce.com/wps/portal/marketing/?urile=wcm:path:/en/home/products/software/operating-systems/4690-operating-system)
3. AcadOS   
[http://homepage.divms.uiowa.edu/~jones/acados](http://homepage.divms.uiowa.edu/~jones/acados)
4. Acorn RISC OS   
[https://www.riscosopen.org](https://www.riscosopen.org)
5. AiroCorp   
[http://airocorp.com](http://airocorp.com)
6. AIX   
[https://www.ibm.com/it-infrastructure/power/os/aix](https://www.ibm.com/it-infrastructure/power/os/aix)
7. Alacris   
[https://alacris.io](https://alacris.io)
8. Aleris   
[https://www.aleris.com](https://www.aleris.com)
9. Allegro   
[https://www.allegro.com](https://www.allegro.com)
10. AmigaOS   
[https://www.amigaos.net](https://www.amigaos.net)
11. Amiga Unix   
[http://www.amigaunix.com/doku.php](http://www.amigaunix.com/doku.php)
12. Amoeba   
[https://www.cs.vu.nl/pub/amoeba](https://www.cs.vu.nl/pub/amoeba)
13. AMX RTOS   
[http://www.kadak.com/rtos/rtos.htm](http://www.kadak.com/rtos/rtos.htm)
14. AneedA   
[https://iamplus.com](https://iamplus.com)
15. Apollo OS   
[https://github.com/Arawn-Davies/Apollo-OS](https://github.com/Arawn-Davies/Apollo-OS)
16. Apostle Project   
[http://apostle.sourceforge.net](http://apostle.sourceforge.net)
17. AROS   
[http://aros.sourceforge.net](http://aros.sourceforge.net)
18. AtheOS   
[http://atheos.pyro-os.org](http://atheos.pyro-os.org)
19. AtomsNet   
[http://atoms.sourceforge.net](http://atoms.sourceforge.net)
20. Atomthreads   
[http://atomthreads.com/index.php](http://atomthreads.com/index.php)
21. AutoSense OS   
[https://www.phonak.com/us/en/about-us/autosense-os-technology.html](https://www.phonak.com/us/en/about-us/autosense-os-technology.html)
22. Azure Sphere   
[https://azure.microsoft.com/en-us/services/azure-sphere](https://azure.microsoft.com/en-us/services/azure-sphere)
23. BareMetal   
[http://www.returninfinity.com](http://www.returninfinity.com)
24. Bitrig   
[https://www.bitrig.org](https://www.bitrig.org)
25. BlackBerry OS   
[https://global.blackberry.com/en/software/smartphones/blackberry-10-os](https://global.blackberry.com/en/software/smartphones/blackberry-10-os)
26. BlueEyedOS   
[http://www.blueeyedos.com](http://www.blueeyedos.com)
27. Brew   
[https://developer.brewmp.com](https://developer.brewmp.com)
28. BS2000   
[https://www.fujitsu.com/fts/products/computing/servers/mainframe/bs2000](https://www.fujitsu.com/fts/products/computing/servers/mainframe/bs2000)
29. CapROS   
[http://www.capros.org](http://www.capros.org)
30. Centrifuge   
[https://centrifuge.io](https://centrifuge.io)
31. Chaos   
[http://chaosdev.io](http://chaosdev.io)
32. ChibiOS   
[http://www.chibios.org/dokuwiki/doku.php](http://www.chibios.org/dokuwiki/doku.php)
33. Chimera RTOS   
[http://www.cs.cmu.edu/~aml/chimera/chimera.html](http://www.cs.cmu.edu/~aml/chimera/chimera.html)
34. Choices   
[http://choices.cs.illinois.edu](http://choices.cs.illinois.edu)
35. Chromium OS   
[https://www.chromium.org/chromium-os](https://www.chromium.org/chromium-os)
36. Cinder   
[http://www.scs.stanford.edu/cinder](http://www.scs.stanford.edu/cinder)
37. Cisco IOS   
[https://www.cisco.com/c/en/us/products/ios-nx-os-software/ios-technologies/index.html](https://www.cisco.com/c/en/us/products/ios-nx-os-software/ios-technologies/index.html)
38. Cisco NX-OS   
[https://www.cisco.com/c/en/us/products/ios-nx-os-software/nx-os/index.html](https://www.cisco.com/c/en/us/products/ios-nx-os-software/nx-os/index.html)
39. Contiki   
[http://www.contiki-os.org](http://www.contiki-os.org)
40. COS   
[http://www.china-cos.com](http://www.china-cos.com)
41. Cosmos   
[https://www.gocosmos.org](https://www.gocosmos.org)
42. CP/M & CP/M Plus   
[http://www.digitalresearch.biz/CPM.HTM](http://www.digitalresearch.biz/CPM.HTM)
43. Darwin   
[https://opensource.apple.com](https://opensource.apple.com)
44. DBOS   
[https://www.dbos.global](https://www.dbos.global)
45. Deos   
[https://www.ddci.com/products\_deos\_do\_178c\_arinc\_653](https://www.ddci.com/products_deos_do_178c_arinc_653)
46. DesktopBSD   
[https://www.desktopbsd.net](https://www.desktopbsd.net)
47. DexOS   
[http://dex-os.github.io](http://dex-os.github.io)
48. DragonFlyBSD   
[https://www.dragonflybsd.org](https://www.dragonflybsd.org)
49. DROPS   
[http://os.inf.tu-dresden.de/drops](http://os.inf.tu-dresden.de/drops)
50. DSPnano RTOS   
[http://rowebots.com/products/dspnano](http://rowebots.com/products/dspnano)
51. DTOS   
[http://www.cs.utah.edu/flux/fluke/html/dtos/HTML/dtos.html](http://www.cs.utah.edu/flux/fluke/html/dtos/HTML/dtos.html)
52. eCos   
[http://ecos.sourceware.org](http://ecos.sourceware.org)
53. EduOS   
[https://github.com/RWTH-OS/eduOS](https://github.com/RWTH-OS/eduOS)
54. EGOS   
[https://egosllc.com](https://egosllc.com)
55. EMBOS   
[https://www.segger.com/products/rtos/embos](https://www.segger.com/products/rtos/embos)
56. EmuTOS   
[http://emutos.sourceforge.net](http://emutos.sourceforge.net)
57. EOS   
[https://www.eosworldwide.com](https://www.eosworldwide.com)
58. EOSIO   
[https://eos.io](https://eos.io)
59. Erika   
[http://erika.tuxfamily.org/drupal](http://erika.tuxfamily.org/drupal)
60. Fabric OS   
[https://www.broadcom.com/products/fibre-channel-networking/software/fabric-operating-system](https://www.broadcom.com/products/fibre-channel-networking/software/fabric-operating-system)
61. FlingOS   
[https://github.com/FlingOS](https://github.com/FlingOS)
62. FortiOS   
[https://www.fortinet.com/products/fortigate/fortios](https://www.fortinet.com/products/fortigate/fortios.html?utm_source=blog&utm_campaign=2018-q3-fortios)
63. FreeBSD   
[https://www.freebsd.org](https://www.freebsd.org)
64. FreeDOS   
[https://www.freedos.org](https://www.freedos.org)
65. FreeVMS   
[http://www.freevms.net](http://www.freevms.net)
66. Frenzy   
[https://distrowatch.com/table.php?distribution=frenzy](https://distrowatch.com/table.php?distribution=frenzy)
67. Friend OS   
[https://friendos.com](https://friendos.com)
68. Fuchsia   
[https://fuchsia.dev](https://fuchsia.dev)
69. FullPliant   
[https://www.fullpliant.org](https://www.fullpliant.org)
70. FxOS   
[https://www.cisco.com/c/en/us/td/docs/security/firepower/fxos/compatibility/fxos-compatibility.html](https://www.cisco.com/c/en/us/td/docs/security/firepower/fxos/compatibility/fxos-compatibility.html)
71. GazOS   
[http://gazos.sourceforge.net](http://gazos.sourceforge.net)
72. GeekOS   
[http://geekos.sourceforge.net](http://geekos.sourceforge.net)
73. Gemini Nucleus   
[http://gemini.sourceforge.net](http://gemini.sourceforge.net)
74. GemOS   
[https://enterprise.gem.co](https://enterprise.gem.co)
75. Genode   
[https://genode.org](https://genode.org)
76. Ghost OS   
[https://ghostkernel.org](https://ghostkernel.org)
77. GhostBSD   
[https://www.ghostbsd.org](https://www.ghostbsd.org)
78. GNU   
[https://www.gnu.org/home.en.html](https://www.gnu.org/home.en.html)
79. GNU Hurd   
[https://www.gnu.org/software/hurd](https://www.gnu.org/software/hurd)
80. GNUstep   
[http://www.gnustep.org](http://www.gnustep.org)
81. GoOS   
[https://github.com/nutterts/GoOS](https://github.com/nutterts/GoOS)
82. Haiku   
[https://www.haiku-os.org](https://www.haiku-os.org)
83. HeartOS   
[https://www.ddci.com/products\_heartos](https://www.ddci.com/products_heartos)
84. HelenOS   
[http://www.helenos.org](http://www.helenos.org)
85. Hive   
[https://hiveos.farm](https://hiveos.farm)
86. House   
[http://programatica.cs.pdx.edu/House](http://programatica.cs.pdx.edu/House)
87. HP-UX   
[https://www.hpe.com/us/en/servers/hp-ux.html](https://www.hpe.com/us/en/servers/hp-ux.html)
88. IBM AIX   
[https://www.ibm.com/it-infrastructure/power/os/aix](https://www.ibm.com/it-infrastructure/power/os/aix)
89. IBM z/VSE   
[https://www.ibm.com/it-infrastructure/z/zvse](https://www.ibm.com/it-infrastructure/z/zvse)
90. Icaros Desktop   
[https://www.patreon.com/icarosdesktop](https://www.patreon.com/icarosdesktop)
91. IchigoJam   
[https://na-s.jp/IJBRPi](https://na-s.jp/IJBRPi)
92. Illumos   
[https://www.illumos.org](https://www.illumos.org)
93. Inferno   
[http://www.vitanuova.com](http://www.vitanuova.com)
94. INTEGRITY   
[https://www.ghs.com/products/rtos/integrity.html](https://www.ghs.com/products/rtos/integrity.html)
95. iOS   
[https://www.apple.com/ios](https://www.apple.com/ios)
96. iPadOS   
[https://www.apple.com/ipados](https://www.apple.com/ipados)
97. iPod software   
[https://support.apple.com/downloads/ipod](https://support.apple.com/downloads/ipod)
98. JOS   
[http://jos.sourceforge.net](http://jos.sourceforge.net)
99. Junos   
[https://www.juniper.net/us/en/products-services/nos/junos](https://www.juniper.net/us/en/products-services/nos/junos)
100. JX OS   
[http://www4.cs.fau.de/Projects/JX](http://www4.cs.fau.de/Projects/JX)
101. KaOS   
[https://kaosx.us](https://kaosx.us)
102. Kaspersky   
[https://os.kaspersky.com](https://os.kaspersky.com)
103. KolibriOS   
[https://kolibrios.org](https://kolibrios.org)
104. kOS   
[https://ksp-kos.github.io/KOS](https://ksp-kos.github.io/KOS)
105. Kronos   
[https://www.korg.com/us/support/download/software/0/424/1514](https://www.korg.com/us/support/download/software/0/424/1514)
106. KRUD   
[https://distrowatch.com/table.php?distribution=krud](https://distrowatch.com/table.php?distribution=krud)
107. KUKA Sunrise.OS   
[https://www.kuka.com/en-us/products/robotics-systems/software/system-software/sunriseos](https://www.kuka.com/en-us/products/robotics-systems/software/system-software/sunriseos)
108. Kylin   
[http://www.kylinos.cn](http://www.kylinos.cn)
109. L4   
[http://l4hq.org/projects/os](http://l4hq.org/projects/os)
110. Linux   
[https://www.linux.com/what-is-linux](https://www.linux.com/what-is-linux)
111. LSE/OS   
[http://lseos.sourceforge.net](http://lseos.sourceforge.net)
112. LuninuxOS   
[https://luninuxos.com/about.html](https://luninuxos.com/about.html)
113. LynxOS   
[https://www.lynx.com](https://www.lynx.com)
114. macOS   
[https://www.apple.com/macos](https://www.apple.com/macos)
115. Manos   
[https://github.com/hellertime/manos](https://github.com/hellertime/manos)
116. MaRTE OS   
[https://marte.unican.es](https://marte.unican.es)
117. Mavericks   
[https://support.apple.com/downloads/mavericks](https://support.apple.com/downloads/mavericks)
118. MidnightBSD   
[https://www.midnightbsd.org](https://www.midnightbsd.org)
119. MikeOS   
[http://mikeos.sourceforge.net](http://mikeos.sourceforge.net)
120. Minix3   
[https://www.minix3.org](https://www.minix3.org)
121. Minoca   
[https://github.com/minoca/os](https://github.com/minoca/os)
122. MenuetOS   
[http://menuetos.net](http://menuetos.net)
123. MkLinux   
[http://mklinux.org](http://mklinux.org)
124. Möbius   
[http://mobius.sourceforge.net](http://mobius.sourceforge.net)
125. ModulOS   
[http://modulos.sourceforge.net](http://modulos.sourceforge.net)
126. MorphOS   
[https://www.morphos-team.net](https://www.morphos-team.net)
127. MOSIX   
[http://www.mosix.org](http://www.mosix.org)
128. MUTOS   
[http://www.robotrontechnik.de/index.htm?/html/software/mutos.htm](http://www.robotrontechnik.de/index.htm?/html/software/mutos.htm)
129. Nachos   
[https://www.cs.odu.edu/~cs471/soumya/salsa.html](https://www.cs.odu.edu/~cs471/soumya/salsa.html)
130. Nemesis   
[http://nemesis.sourceforge.net](http://nemesis.sourceforge.net)
131. Nerthus   
[https://nerthusfoundation.org](https://nerthusfoundation.org)
132. NetBSD   
[https://www.netbsd.org](https://www.netbsd.org)
133. NewOS   
[http://newos.org](http://newos.org)
134. Nexenta   
[https://nexenta.com](https://nexenta.com)
135. Nexus   
[https://www.cs.cornell.edu/people/egs/nexus](https://www.cs.cornell.edu/people/egs/nexus)
136. Nimbus   
[https://sourceforge.net/p/nimbusos/wiki/Home](https://sourceforge.net/p/nimbusos/wiki/Home)
137. Nintendo Switch OS   
[https://www.nintendo.com/switch](https://www.nintendo.com/switch)
138. Node-OS   
[https://node-os.com](https://node-os.com)
139. nOS   
[https://nos.io](https://nos.io)
140. Nova   
[http://repo.nova.cu](http://repo.nova.cu)
141. Nucleus RTOS   
[https://www.mentor.com/embedded-software/nucleus](https://www.mentor.com/embedded-software/nucleus)
142. O3ONE   
[http://www.o3one.org](http://www.o3one.org)
143. Oberon   
[http://www.projectoberon.com](http://www.projectoberon.com)
144. Odin   
[https://samsungodin.com](https://samsungodin.com)
145. On Time RTOS-32   
[http://www.on-time.com](http://www.on-time.com)
146. ONTAP   
[https://www.netapp.com/us/products/data-management-software/ontap.aspx](https://www.netapp.com/us/products/data-management-software/ontap.aspx)
147. Opal   
[https://homes.cs.washington.edu/~levy/opal/opal.html](https://homes.cs.washington.edu/~levy/opal/opal.html)
148. OpenBSD   
[https://www.openbsd.org](https://www.openbsd.org)
149. OpenIndiana   
[https://www.openindiana.org](https://www.openindiana.org)
150. OpenVMS   
[https://www.vmssoftware.com](https://www.vmssoftware.com)
151. OppcOS   
[http://oppcos.sourceforge.net](http://oppcos.sourceforge.net)
152. OSE   
[https://www.enea.com/ose](https://www.enea.com/ose)
153. osFree   
[http://www.osfree.org](http://www.osfree.org)
154. OSv   
[http://osv.io](http://osv.io)
155. Paros   
[http://research.ac.upc.edu/paros](http://research.ac.upc.edu/paros)
156. PetrOS   
[http://www.trumpet.com.au/index.php/products/9-operating-systems/20-petrosr-operating-system.html](http://www.trumpet.com.au/index.php/products/9-operating-systems/20-petrosr-operating-system.html)
157. Phantom   
[http://dzavalishin.github.io/phantomuserland](http://dzavalishin.github.io/phantomuserland)
158. PikeOS   
[https://www.sysgo.com/products/pikeos-hypervisor](https://www.sysgo.com/products/pikeos-hypervisor)
159. PIOS   
[http://zoo.cs.yale.edu/classes/cs422/pios](http://zoo.cs.yale.edu/classes/cs422/pios)
160. Plan 9 from Bell Labs   
[https://9p.io/plan9](https://9p.io/plan9)
161. PM\_SZ\_OS   
[https://www.the-sz.com/products/pm\_sz\_os](https://www.the-sz.com/products/pm_sz_os)
162. PonyOS   
[https://ponyos.org](https://ponyos.org)
163. PowerMAX   
[https://www.dellemc.com](https://www.dellemc.com/en-us/collaterals/unauth/data-sheets/products/storage/h16891-powermax-family-ds.pdf)
164. Proolix   
[http://www.cs.cmu.edu/~brians/comp/proolix.html](http://www.cs.cmu.edu/~brians/comp/proolix.html)
165. PTS DOS   
[http://phystechsoft.ru/pts-dosl](http://phystechsoft.ru/pts-dos)
166. Puppy Linux   
[http://puppylinux.com](http://puppylinux.com)
167. PureDarwin   
[http://www.puredarwin.org](http://www.puredarwin.org)
168. PureOS   
[https://www.pureos.net](https://www.pureos.net)
169. QNX   
[https://blackberry.qnx.com](https://blackberry.qnx.com)
170. Quant Network   
[https://www.quant.network](https://www.quant.network)
171. RadiOS   
[http://radios.sourceforge.net](http://radios.sourceforge.net)
172. RCOSjava   
[http://rcosjava.sourceforge.net](http://rcosjava.sourceforge.net)
173. ReactOS   
[https://reactos.org](https://reactos.org)
174. REAL/32   
[https://winworldpc.com/product/real-32/7x](https://winworldpc.com/product/real-32/7x)
175. REBOL-IOS   
[http://www.rebol.com/index-ios.html](http://www.rebol.com/index-ios.html)
176. Red Hat Linux   
[https://www.redhat.com/en/technologies/linux-platforms/enterprise-linux](https://www.redhat.com/en/technologies/linux-platforms/enterprise-linux)
177. Red Star OS   
[https://www.visitthedprk.org/made-in-north-korea-red-star-o-s](https://www.visitthedprk.org/made-in-north-korea-red-star-o-s)
178. Redox   
[https://www.redox-os.org](https://www.redox-os.org)
179. Remix OS   
[http://www.jide.com/en/remixos](http://www.jide.com/en/remixos)
180. REWIN OS   
[https://www.cht.com](https://www.cht.com/cht/web.nsf/id/pa_en_productdetail.html?Open&pID=00013327.100_EN)
181. RISC OS Pi   
[https://www.riscosopen.org/content/downloads/raspberry-pi](https://www.riscosopen.org/content/downloads/raspberry-pi)
182. Rodos   
[http://www8.informatik.uni-wuerzburg.de/wissenschaftforschung/rodos](http://www8.informatik.uni-wuerzburg.de/wissenschaftforschung/rodos)
183. ROME   
[http://rome.sourceforge.net](http://rome.sourceforge.net)
184. RTEMS   
[https://www.rtems.org](https://www.rtems.org)
185. RTOS-UH   
[http://rtos.iep.de/indexe.htm](http://rtos.iep.de/indexe.htm)
186. RTX   
[https://www.intervalzero.com](https://www.intervalzero.com)
187. RTXC Quadros RTOS   
[http://quadros.com/products/operating-systems/rtxc-quadros-rtos-advanced](http://quadros.com/products/operating-systems/rtxc-quadros-rtos-advanced)
188. RxDOS   
[https://sourceforge.net/projects/rxdos](https://sourceforge.net/projects/rxdos)
189. S.Ha.R.K   
[http://shark.sssup.it](http://shark.sssup.it)
190. Safebit   
[https://safebit.io](https://safebit.io)
191. Sanos   
[http://www.jbox.dk/sanos](http://www.jbox.dk/sanos)
192. ScorchOS   
[https://sourceforge.net/projects/scorchos](https://sourceforge.net/projects/scorchos)
193. ScottsNewOS   
[http://scottsnewos.sourceforge.net](http://scottsnewos.sourceforge.net)
194. SCP Foundation Operating System   
[http://www.scp-wiki.net/forum/t-2050004/scp-foundation-operating-system](http://www.scp-wiki.net/forum/t-2050004/scp-foundation-operating-system)
195. SEVMS VAX   
[https://www.cyber.gov.au/publications/epl/sevms-vax](https://www.cyber.gov.au/publications/epl/sevms-vax)
196. SharkOS   
[https://distrowatch.com/table.php?distribution=shark](https://distrowatch.com/table.php?distribution=shark)
197. ShawnOS   
[https://github.com/shawnanastasio/ShawnOS](https://github.com/shawnanastasio/ShawnOS)
198. Sinclair OS   
[https://sinclair-uk.weebly.com/sinclair-os.html](https://sinclair-uk.weebly.com/sinclair-os.html)
199. SimpleOS   
[http://sos.enix.org/fr/PagePrincipale](http://sos.enix.org/fr/PagePrincipale)
200. SmartOS   
[https://www.joyent.com/smartos](https://www.joyent.com/smartos)
201. Solaris   
[https://www.oracle.com/solaris](https://www.oracle.com/solaris)
202. SPIN   
[http://www-spin.cs.washington.edu](http://www-spin.cs.washington.edu)
203. Spinix   
[http://www.ibiblio.org/spinix/about.html](http://www.ibiblio.org/spinix/about.html)
204. Spring   
[https://www.iaps.com/Spring.html](https://www.iaps.com/Spring.html)
205. Squeak   
[http://wiki.squeak.org/squeak/5727](http://wiki.squeak.org/squeak/5727)
206. STARCOS   
[http://www.arp.com/medias/13438540.pdf](http://www.arp.com/medias/13438540.pdf)
207. SteamOS   
[https://store.steampowered.com/steamos](https://store.steampowered.com/steamos)
208. Stratus VOS   
[https://www.stratus.com/es/solutions/platforms/v-series-continuum-openvos/operating-systems](https://www.stratus.com/es/solutions/platforms/v-series-continuum-openvos/operating-systems)
209. Stupid Operating System   
[https://github.com/sos-os/kernel](https://github.com/sos-os/kernel)
210. SymbOS   
[http://www.symbos.de](http://www.symbos.de)
211. Symobi   
[http://www.symobi.com](http://www.symobi.com)
212. Symphony OS   
[https://distrowatch.com/table.php?distribution=symphony](https://distrowatch.com/table.php?distribution=symphony)
213. Talos   
[https://github.com/talos-systems/talos](https://github.com/talos-systems/talos)
214. TAOS   
[http://www.uruk.org/emu/Taos.html](http://www.uruk.org/emu/Taos.html)
215. TCx Sky Operating System   
[https://www.toshibacommerce.com](https://www.toshibacommerce.com/wps/portal/marketing/?urile=wcm:path:/en/home/products/software/operating-systems/tcx-sky-operating-system)
216. TempleOS   
[https://templeos.org](https://templeos.org)
217. The Operating System   
[http://www.theoperatingsystem.org](http://www.theoperatingsystem.org)
218. THEOS   
[http://www.theos-software.com](http://www.theos-software.com)
219. Thix   
[http://hulubei.net/tudor/thix/index.html](http://hulubei.net/tudor/thix/index.html)
220. THREADX ROTS   
[https://rtos.com/solutions/threadx/real-time-operating-system](https://rtos.com/solutions/threadx/real-time-operating-system)
221. TI-RTOS Kernel   
[http://www.ti.com/tool/TI-RTOS-MCU](http://www.ti.com/tool/TI-RTOS-MCU)
222. TinyOS   
[hhttp://www.tinyos.net](http://www.tinyos.net)
223. Tizen   
[https://www.tizen.org](https://www.tizen.org)
224. ToaruOS   
[https://toaruos.org](https://toaruos.org)
225. TORNADO   
[http://www.tornado-os.com](http://www.tornado-os.com)
226. Torsion   
[http://www.nongnu.org/torsion](http://www.nongnu.org/torsion)
227. TRON   
[https://www.tron.org](https://www.tron.org)
228. TRON Network   
[https://tron.network](https://tron.network)
229. TrueOS   
[https://www.trueos.org](https://www.trueos.org)
230. TUD:OS   
[http://demo.tudos.org](http://demo.tudos.org)
231. tvOS   
[https://developer.apple.com/tvos](https://developer.apple.com/tvos)
232. µ-velOSity   
[https://www.ghs.com/products/micro\_velosity.html](https://www.ghs.com/products/micro_velosity.html)
233. µC/OS   
[https://www.micrium.com/rtos](https://www.micrium.com/rtos)
234. UberOS   
[https://github.com/TsarN/uber-os](https://github.com/TsarN/uber-os)
235. UDOS   
[http://www.sde.cs.titech.ac.jp/~gondow/udos/index.html](http://www.sde.cs.titech.ac.jp/~gondow/udos/index.html)
236. Unix   
[https://www.opengroup.org/membership/forums/platform/unix](https://www.opengroup.org/membership/forums/platform/unix)
237. UnixWare   
[https://www.xinuos.com/menu-products/unixware-2018](https://www.xinuos.com/menu-products/unixware-2018)
238. V2 OS   
[https://www.v2.nl/archive/works/v2\_os](https://www.v2.nl/archive/works/v2_os)
239. Veloce OS3   
[https://www.mentor.com/products/fv/emulation-systems/veloce-apps#os3](https://www.mentor.com/products/fv/emulation-systems/veloce-apps#os3)
240. VisiOn   
[http://www.theoperatingsystem.org/vision-mission](http://www.theoperatingsystem.org/vision-mission)
241. Visopsys   
[https://visopsys.org](https://visopsys.org)
242. VM/ESA   
[http://www.vm.ibm.com/techinfo/vmfblank.html](http://www.vm.ibm.com/techinfo/vmfblank.html)
243. VMS   
[https://www.vmssoftware.com](https://www.vmssoftware.com)
244. VxWorks   
[https://www.windriver.com/products/vxworks](https://www.windriver.com/products/vxworks)
245. WatchOS   
[https://www.apple.com/watchos](https://www.apple.com/watchos)
246. Wii U OS   
[http://nintendotoday.com/wii-u-operating-system](http://nintendotoday.com/wii-u-operating-system)
247. Windows/Windows NT   
[https://www.microsoft.com/en-us/windows](https://www.microsoft.com/en-us/windows)
248. Xbox 360 OS   
[https://support.xbox.com/en-US/xbox-360/console/system-update-operating-system](https://support.xbox.com/en-US/xbox-360/console/system-update-operating-system)
249. Xbox One   
[https://support.xbox.com/en-US/browse/xbox-one/console/System%20update](https://support.xbox.com/en-US/browse/xbox-one/console/System%20update)
250. Xinu   
[https://xinu.cs.purdue.edu](https://xinu.cs.purdue.edu)
251. Xinuos OpenServer   
[https://www.xinuos.com/menu-products/openserver-10](https://www.xinuos.com/menu-products/openserver-10)
252. xMach   
[http://xmach.sourceforge.net](http://xmach.sourceforge.net)
253. XTS-400   
[https://www.baesystems.com](https://www.baesystems.com)
254. Yamit   
[https://sourceforge.net/p/yamit/wiki/Home](https://sourceforge.net/p/yamit/wiki/Home)
255. z/VM   
[https://www.ibm.com/it-infrastructure/z/zvm](https://www.ibm.com/it-infrastructure/z/zvm)
256. z/OS   
[https://www.ibm.com/it-infrastructure/z/zos](https://www.ibm.com/it-infrastructure/z/zos)
257. Zephyr   
[https://www.zephyrproject.org](https://www.zephyrproject.org)
258. ZevenOS   
[https://www.zevenos.com](https://www.zevenos.com)
259. Zorin OS   
[https://zorinos.com](https://zorinos.com)
Let us know if we missed your favorite operating system.

This data is from [Vuild’s operating systems list](https://vuild.com/operating-system). Please visit [vuild.com](https://vuild.com) for more.