Operating system
software that manages computer hardware resources
Machine code monitor
Apple Pascal
Kaleidoscope
Windows 10
MS-Net
Windows Phone 7.x
Windows 10 Mobile
OS/2
MiNT
IS-DOS
Windows Server 2016
Android Marshmallow
Windows Azure
Series 40
Windows for Workgroups 3.11
Oberon
CAINE Linux
iOS 9
OS X El Capitan
Android Things
OS-9
Prologue
PTS-DOS
Android Donut
PRIMOS
Windows Mobile
real-time operating system
TRIPOS
Red Hat Enterprise Linux
BlackBerry Tablet OS
Android Froyo
Android Nougat
Mac OS X Leopard
BIOS
Event Driven Executive
Microsoft Forefront
Android Petit Four
Android 1.0
Red Flag
Cosmos
Q4OS
SO
Bada
iOS 10
UNIX System Services
FlexOS
Windows Embedded Standard 7
Google Fuchsia
Rhapsody
Research Unix