Everybody who would like to know whether an operating system with a certain name really exists or just like to explore all names, this is an excellent place to start with. You will find all types and derivatives of operating systems: commercial, free, open source and closed source. This list does not distinct between the recent stage of development, application purpose, distribution or hardware platform. Operating systems with different version numbers are only considered if they are technically clearly different to each other.
This list offers hundreds of operating system product and project names, many of them are based on the same operating system with more or less differences in the source code. The most operating systems can be traced down to few development lines and derive from a small amount of system software. This applies especially to Linux distributions with a low number of main distributions and high number of derivatives. Other operating system families are Windows and Unix.
Operating Systems (608)
2K86-DOS
A/UX
Acados
ACP (Airline Control Program)
AdaOS
ADMIRAL
Adrenaline
aerolitheOS
Aimos
AIOS
AIX
AIX/370
AIX/ESA
Aleris Operating System
Allegro
AllianceOS
Alpha OS
Alto OS
Amiga OS
Amoeba
Amstrad
AMX RTOS
AneedA
AngelOS
Antarctica
AOS/VS
Aperios
Apollo Domain/OS
ApolloOS
Apostle
Archimedes OS
AROS
ARTOS
Asbestos
Athena
AtheOS
AtomsNet
Atomthreads
AuroraOS
AutoSense OS
B-Free
Bada
BAL
Banyan VINES
Basic Executive System
BeIA
BeOS
Beowulf
BKY
BlueEyedOS
BOS
BOS1810
BoxOS
BPMK
bpmk
BRiX
BS600
BS2000
BSDi
BugOS
Calmira
CCP (Computer Control Program)
CDOS
Cefarix
C Executive
Chaos
ChibiOS
Chimera
Chippewa OS
Choices
Chorus
Cinder OS
Cisco IOS
Clicker32
CMW+ (SCO)
COBRA
Coherent
CONSENSYS
Contiki
ConvexOS
Cos
Cosy
Counterpoise
CP/K
CP/M
CP/NET
CP/Z
CPF (Control Program Facility)
Cromix
Cronus
CSOC
CTOS
CTSS
CX/SX
Cygnus
DAC
Darwin
Data General
DC/OSx
DCP
Degenerate OS
Delitalk
DELL UNIX
Deming OS
DEMOS
DesktopBSD
DESKWORK
DG/UX
DIGITAL UNIX
dingOS
DK/DOS
DLD
DNIX
Domain OS
DOS
DOS2
DOS 50
Dosket
dr'ex
DR-DOS
Drops
Drywell OS
DS-OS
DTOS
DVIX
DYNIX Unix (Sequent)
ECL-3211
eComStation
eCos
EduOS
EGOS
ekkoBSD
Elate
ELKS
Elysium
EOS
EP/IX
EPOC
ERaMS
ERIKA
EROS
ESER
ESIX
ESKO
Eumel
EuNIX
Exopc
ExOS
Express
Famos
FDOS
Fiasco
Flamethrower
FlashOS
FlexOS
FlingOS
FLP-80 DOS
Flux
Flux-Fluke-Flask
FMS
Forth
FortiOS
FreeBSD
FreeDOS
FreeDOWS
FreeVMS
Frenzy
Fuchsia
FullPliant
FunatixOS
FxOS
GazOS
GCOS
GECOS
GeekOS
Gemini Nucleus
Genera
GEORGE
GEOS
GM OS
GNU Hurd
GNUstep
Go
Goah
Gould OS
Grasshopper
GUIDE
HA-MSP
Hactar
Harmony
Haïku
Helios
HES
Hive
HOPE
HP-87 OS
HP-UX
HT-11
Hurd
Hurricane
HydrixOS
i5/OS
IBM PC-DOS
IBSYS
Icaros Desktop
ICL Unix
Immunix
Inferno
INMOS
INTEGRITY RTOS
Iridium OS
IRIX
iRMX
IRTS
ISC (Interactive)
ISIS
ISSL
ITRON
ITS
JAMB
JavaOS
Jbed
JeniOS
Jeo-OS
Jibbed
JOS
JTMOS
JUNOS
JxOS
KAOS
Katix
Kea
Kerberos
KeyKOS
KolibriOS
KOS
KRONOS
KROS
KRUD
Kylin
L4
L13Plus
LainOS
LAN Manager
LDOS
LegOS
leJOS
Linux
Lisa OS
LTSS
LynxOS
Mach
Mac OS 8
Mac OS 9
Mac OS X
MANOS
MaRTE OS
Maruti
Masix
Master
Maverick OS
MBOS
MCP (Master Control Program)
MDOS
MenuetOS
Merlin
Micriµm
MICRODOS
MicroVMS
MidnightBSD
MikeOS
Minima
Minix
Minux
Miranda
Miray µnOS
MITE 80/IOS
MK++
ML
ModulOS
Monitor
MOPS
MorphOS
MOS
MOSIX
MPE/iX
MPE OS
MRT1700
MS-DOS
MSOS
MT809
Multics
Mungi
MUTOS
muVinix
MVS
Möbius
NachOS
NCR Unix
NEC DOS
NECUX
Nemesis
NeOS
NetBSD
Netware
NewDeal
NEWDOS
NewOS
NEWS-OS
Newton OS
NexentaOS
NeXTStep
NextworksOS
Nexus
Nimbus
NintendOS
Node OS
NOS
NOS/BE
NOS/VE
Nova
Novell DOS
NS/GDOS
NSK
NTDIOS
Nucleus
Oaesis
Oasis
Oberon
Objex
Odin
Omega 4
OnCore
On Time RTOS-32
Opal
OpenBeOS
OpenBSD
OpenDarwin
OpenRavenscar
OpenServer
OpenSolaris
OpenVision
OpenVMS
OppcOS
OS-2
OS-9
OS-C
OS/2
OS/2 Warp
OS/9
OS/360
OS/390
OS/400
OS/ES
OS/M
OS4
osCAN
OSE
OSF/1
Osx
OSx16
OZONE
PAKOS
Palm OS
PAPL
Paramecium
ParixOS
Paros
PaulOS
P BASIC
PC-BSD
PC-DOS
PC-MOS/386
PC/M-System
PDOS
PEACE
Pebble
Pegasos
PETROS
Phantom OS
Phos
PikeOS
PIOS
PizziOS
Plan 9
Plex86
PM_SZ_OS
PocketPC 2003
PowerMAX
PowerOS
PowerSX
PowerUX
ProDOS
Prologue
Proolix
ProOSEK
PSOS
pSOSystem
PSU
PTS DOS
PublicOS
PURE
QDOS
QNX
Quadros
RadiOS
RBASIC
RCOS
RCOSjava
RDOS
ReactOS
REAL-32
Realogy Real Time Architekt
REBOL-IOS
Redox
ReWin
REX-80/86
REXX/OS
RHODOS
RISC OS
RMOS
RMS 68k
Roadrunner
Rocket
ROME
Rome
RSTS/E
RSX-11
RT-11
RTEL
RTEMS
RT Mach NTT
rtmk
RTMX
RTOS-32
RTOS-UH
RTS-80
RTX
RTXDOS
RxDOS
S.Ha.R.K
Sanos
SCO OpenServer
SCOPE
ScorchOS
ScottsNewOS
Scout
SCP
SCP (System Control Program)
SCP-IBE
Self-R
SeOS
Sequent
SEVMS VAX
Shark
SharpOS
ShawnOS
SIBO
Sinclair
Sinix
SINTRAN III
SkyOS
Slikware
sMultiTA
SOBS
Solaris
Solar_OS
Solbourne UNIX
SOS
SP6800
Spice
Spice/MT
SPIN
Spinix
SPOX
Spring
Squeak
SSP (System Support Program)
STAR-OS
STARCOS
Starplex II OS
Sting
StreamOS
Subsump
SUMO
SunMOS
SunOS
SunriseOS
SuperDOS
SVM
SVR
Syllable
Symbian OS
SymbOS
Symobi
Symphony OS
Synapse
System 6 (Mac OS)
System 7 (Mac OS)
System V Release
TABOS
Tabos
TalOS
TAOS
TENEX
THE
Thix
ThreadX
ThrillOS
TI-99 4A
TinyOS
TIS APL
TNIX
TOPS-10
TOPS-20
Topsy
Tornado
Torsion
TOS
TPF (Transaction Processing Facility)
TriangleOS
Tripos
TRON
TRS-DOS
Tru64 UNIX
TSX-32
TUD:OS
TUNES
TurboDOS
UberOS
UCSD-p
UDOS
Ultrix
UMDS
UMN
UNI/OS
Unicos
UNICOS/lc
Uni FLEX
Unisys U5000
Unix System
UnixWare
Unununium
USIX
UTS
UXP/V
V2 OS
Vapour
Veloce OS3
VERSAdos
VisiOn
Visopsys
Visual Network OS
VM/ESA
VM/VSE
VME
VMS
VRTX/8002
VRTX/OS
VSE
VSOS
VSTa
VTOS
VxWorks
WEGA
WildMagnolia
Windows 7
Windows 8
Windows 10
Windows 95
Windows 98
Windows 98 SE
Windows 2000
Windows Automotive
Windows CE
Windows ME
Windows NT
Windows Server 2003
Windows Server 2003 R2
Windows Server 2008
Windows Server 2008 R2
Windows Vista
Windows XP
WinMac
WIZRD
x-kernel
XAOS
XDOS
Xenix
Xinu
xMach
XOS
XTS
Yamit
Yaxic
Yoctix
z-VM
z/OS
Z9001-OS
ZealOS
Zephyr
Zeta
Zeus Zilog
zeVenOS
ZMOS
ZotOS
ZRTS 8000
Linux Distributions (649)
3Anoppix64 Studio
Absolute Linux
AbulÉdu
Adamantix
ADIOS
Adler Linux
Admelix
Admiral Linux
AGNULA
Alcolix
Alinex
aLinux
AliXe
Alpine Linux
ALT Linux
amaroK Live
Amber
andLinux
Android
Ankur
Annvix
AnNyung
Anonym.OS
ANTEMIUM
antiX
APODIO
aquamorph
Arabian
ArcheOS
Archie
Arch Linux
Ark Linux
Armed Linux
ArtistX
Arudius
AsianLinux
Asianux
ASork
ASP Linux
Astaro
AsteriskNOW
Athene
ATMission
Atomix
Augustux
Aurora
Aurox
AUSTRUMI
B2D
BabelDisc
BackTrack
Baltix
Bayanihan
BearOps Linux
BeatrIX Linux
Beehive Linux
BeleniX
Bent Linux
Berry Linux
BestLinux
BIG LINUX
BinToo
BioBrew
Bioknoppix
Black Cat Linux
blackPanther
BLAG
Blin Linux
Bloody Stupid
Blue Cat Linux
BlueLinux
Bluewall
Bodhi Linux
Bonzai Linux
Bootable Cluster CD
Buffalo
BugnuX
BU Linux
Burapha
ByzantineOS
Caixa Mágica
Caldera Linux
cAos
Carl.OS
Catix
CCux
CDlinux
Censornet
CentOS
Chakra
Chrome OS
Chromium OS
cl33n
ClarkConnect
ClearOS
cLIeNUX
Clonezilla Live
Clusterix
clusterKNOPPIX
Co-Create
CobaltOS
College
Commodore OS Vision
Condorux
Conectiva Linux
Cool Linux CD
CoreBiz
Coreboot
Corel Linux
CoreOS
Coyote
Craftworks Linux
CrunchBang
CrunchEee
CRUX
Cub Linux
CÃ tix
Damn Small Linux
Damn Vulnerable Linux
Danix
DARKSTAR
Debian GNU/Linux
Debris Linux
Deep-Water
Deft Linux
DeLi
Delix Linux
Dell Networking OS10
Denix
Devil
Dizinha
DLD
DNALinux
Draco Linux
Dragon Linux
Dragora
DRBL live
Dreamlinux
Dualix
Dynabolic
dyne:bolic
Dzongkha
E/OS LX Desktop
Eadem
Eagle
eAR OS
easyLinux
Easy Peasy
easys
Edubuntu
eduKnoppix
EduLinux
Ehad
Eisfair
Elbuntu
ELE
eLearnix
elementary OS
ELF
Elfstone Linux
ELinOS
Elive
ELP
ELX
Embedix
Endian
Endless OS
EnGarde
ERPOSS
ESware
Euronode
EvilEntity Linux
Evinux
EzPlanet One
FAMELIX
FaunOS
Feather
Featherweight
Fedora
Fermi
ffsearch-LiveCD
Finnix
Firefox OS
Fiubbix
Flash
FlightLinux
Flonix
Fluxbuntu
FluxFlux-Eee
Foresight
FoRK
Formilux
FoX Desktop
Freduc
free-EOS
Freedows
Freeduc
FreeNAS
Freepia
FreeSBIE
Freespire
FreevoLive
Freezy
Frugalware
FTOSX
FusionSphere
GalliumOS
GeeXboX
Gelecek
GenieOS
Gentoo
Gentoox
GEOLivre
Gibraltar
Ging
Giotto
Glendix
gNewSense
GNIX
Gnoppix
GNUbie Linux
gnuLinEx
GNUstep
GoblinX
GoboLinux
GoodGoat Linux
gOS (Google OS)
GParted
Grafpup
Granular Linux
grml
Guadalinex
Guix
GuLIC-BSD
H3Knix
Haansoft
Hakin9
Halloween Linux
Hancom
Hedinux
Helix
Heretix
Hikarunix
Hiweed
Holon
HOLON Linux
Honeywall
How-Tux
Hubworx
iBox
ICE Linux
Icepack Linux
IDMS
Igelle
Igel Linux
Ignalum
Impi
Independence
IndLinux
Instant WebKiosk
IPCop
JBLinux
Jolicloud
JoLinux
Joli OS
Julex
Jurix Linux
Juxlala
K-DEMar
K12LTSP
Kaboot
Kaella
Kaladix Linux
Kalango
Kali Linux
KANOTIX
Karamad
KateOS
Kinneret
Kiwi Linux
Klax
Klikit-Linux
K Linux
kmLinux
knopILS
Knoppel
Knopperdisk
Knoppix
Knoppix 64
KnoppiXMAME
KnoppMyth
KnoSciences
Kodibuntu
Komodo
Kongoni
Korora
KRUD
Kubuntu
Kuki Linux
Kurumin
Kwort
L.A.S.
Leetnux
Lerntux
LFS
LG3D
LibraNet Linux
LibreCMC
LIIS
Lin-X
Linare
LindowsOS
Lineox
LinEspa
LinnexOS
Linpus
Linspire
Linux+ Live
Linux-EduCD
Linux4One
Linux Antarctica
Linux by LibraNet
LinuxConsole
Linux DA OS
LinuxMCE
Linux Mint
LINUXO
LinuxOne
LinuxPPC
LinuxTLE
Linux XP
Litrix
LiveCD Router
LiveKiosk
LiVux
LLGP
LliureX
LNX-BBC
Loco
Lormalinux
l OS
LST Linux
LTSP
LUC3M
Luit
Lunar
LuteLinux
LXDEbian
Lycoris Desktop/LX
m0n0wall
Mageia
Magic
Mandrake
Mandriva
Mangaka
MAX
MaxOS
Mayix
MCNLive
Mediainlinux
Media Lab
MeeGo
MEPIS
MiniKazit
Minislack
Miracle
MirOS
MkLinux
Moblin
Mockup
MoLinux
Momonga
Monoppix
Monte Vista Linux
MoonOS
Morphix
MostlyLinux
MoviX
MSC
Mulimidix
muLinux
Multi Distro
Muriqui
MURIX
Musix
Mutagenix
Myah OS
myLinux
Nasgaïa
Nature's
Navyn OS
NepaLinux
NetMAX DeskTOP
NetSecL
Netstation Linux
Netwosix
Nexenta
Niigata
NimbleX
Nitix
NoMad Linux
Nonux
Nova
NST
nUbuntu
Nuclinux
NuxOne
O-Net
OcNOS
Ocularis
Ola Dom
Omega
Omoikane
Onebase Linux
OpenArtist
OpenLab
OpenLinux
OpenLX
OpenMamba
OpenMediaVault
OpenNA
Open ProgeX
Openwall
Operator
Oracle Linux
Oralux
Overclockix
P!tux
PAIPIX
paldo
Parabola
ParallelKnoppix
Pardus
Parsix
Parsix GNU/Linux
PC/OS
PCLinuxOS
Peanut Linux
PelicanHPC
Penguin Sleuth
Pentoo
Peppermint
Pequelin
pfSense
Phaeronix
Phantomix
Phat Linux
PHLAK
Pie Box
Pilot
Pingo
Pingwinek
Pioneer Linux
Plamo
PLD
PLoP Linux
Pocket Linux
Poseidon
POSTed
Power Desktop
Pozix Linux
pQui
Privatix
Progeny
ProteanOS
ProTech
PUD
Pulsar Linux
Puppy
Puredyne
QiLinux
Qimo
Qplus
Quantian
Qubes OS
Raidiator
Raspbian
Red Flag
Red Hat
RedHawk Linux
Redmond Linux
redWall Firewall
Remix OS
Repairlix
RIoT
RIP
ROCK
Rock Linux
Rocks Cluster
ROOT
ROSLIMS
rPath
RR4 Linux
RTLinux
Rubix
Sabayon
Sabily
Sailfish OS
Salgix
Salix OS
Salvare
SAM
Samhain Linux
Santa Fe
Sauver
SaxenOS
SCI.Linux
Scientific Linux
SCO Linux
ScrudgeWare
Securepoint
Sentry Firewall
Shift Linux
Shinux
SimplyMEPIS
Skolelinux
Slack/390
Slackintosh
Slackware
Slamd64
SLAMPP
slax
SliTaz GNU/Linux
SLS
SLYNUX
SME Server
SmoothWall
SnapGear Embedded Linux
SNAPPIX
Snøfrix
SoL (Server optimized Linux)
SONiC
Sorcerer
SOT Linux
Source Mage
Spectra Linux
SphinxOS
Splack
Splashtop
SprezzOS
Stampede
StartCom
STD
Stormix
StreamBOX
StressLinux
STUX
STX
Subgraph OS
Sugar On A Stick
SuliX
Sun Linux
Sun Wah
SuperGamer
SuSE
Symphony OS
SystemRescue
T2
TA-Linux
Tablix
Tails (The Amnesic Incognito Live System)
Tao Live
Taprobane
TechLinux
Thinstation
Tilix
Tinfoil Hat Linux
Tiny Core Linux
Titan LEV
Tizen
tomsrtbt
Tomukas
Toophpix
Topologilinux
Toutou
Trinity
Trisquel GNU/Linux
Trixbox
Troppix
Trustix
Trustverse
Truva
TumiX
TupiServer
Tuquito
Turbolinux
Turkix
Ubuntu
UbuntuME
Ubuntu Netbook Remix
Ubuntu Privacy Remix
uClinux
Ufficio Zero
UHU-Linux
uL
Ulteo
Ultima
Underground
Unifix Linux
uOS
Urli OS
UserLinux
UTILEX
Ututo
Ututo XS
Vector
Vidalinux
VideoLinux
Vine
VLOS
VNLinux
Voltalinux
Volumio
WarLinux
Wazobia
Webfish Linux
WHAX
White Box
Whitix
WIENUX
Wind River Linux
WinLinux 2001
WinSlack
Wolvix
WOMP!
X-evian
X/OS
Xandros
Xarnoppix
Xenoppix
Xfld
Ximian Desktop
xPud
Xteam
XtreemOS
Xubuntu
Yellow Dog
YES
Yggdrasil Linux
Ylmf OS
Yoper
YunOS
Zebuntu
Zentyal
Zenwalk
Zeroshell
ZoneCD
Zorin OS
source : http://www.operating-system.org
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