Operating system
software that manages computer hardware resources
operating environment
Version 7 Unix
Palm OS
Halon
network operating system
Phoenix OS
Ghost
Rancher Labs
Android Gingerbread
Android Honeycomb
Android Ice Cream Sandwich
Android Jelly Bean
Android 7.1
eCos
Windows 10 S
Samsung Experience
Nintendo Switch system software
Glass OS
Android Oreo
Windows 3.1x
AFROS
Amiga Unix
Cloud OS
Commotion
iOS 11
live distribution
UNIX/32V
Genera
Nintendo 3DS system software
IMOS
Super OS
GNU/Linux
Wii system software
Windows Embedded Industry
MP/M
NOS
Windows Server 2000
Windows Home Server
BS2000
68K/OS
DOS/360
Devil-Linux
Trusted operating system
security-focused operating system
DEC BATCH-11/DOS-11
Apple SOS
Apple GS/OS
Version 6 Unix
Windows 8.1
DEFT Linux