Five motorola smartphones with android operating system
The phone on the Android operating system is on the table
The logo of the Android 4.4 operating system is red
Welcome screensaver of the Windows operating system
Schematic representation of the operating system on a green background
The logo of the Windows 8 operating system, in blue and white
Minimalistic image of the windows eight operating system emblem
Linuk ubuntu operating system logo on a black background