Operating systems

•  Android 4.4 "KitKat" (1)
•  Android 8.0 "Oreo" (2)
•  Apple iOS (17)
•  Chrome OS (1)
•  Linux (3)
•  Mac OS (16)
•  Mac OS X (10.x) (7)
•  Windows Vista (4)
•  Windows XP (1)