A mobile operating system (or mobile OS) is an operating system for smartphones, tablets, or other mobile devices. While computers such as typical laptops are mobile, the operating systems usually used on them are not considered mobile ones, as they were originally designed for desktop computers that historically did not have or need specific mobile features. This distinction is becoming blurred in some newer operating systems that are hybrids made for both uses. So-called mobile operating systems, or even only smartphones running them, now represent most (web) use (on weekends and averaged for whole weeks). Mobile operating systems, are now, as of late 2016, the most used kind, with traditional desktop OS, now a minority used kind; see usage share of operating systems. However, variations occur in popularity by regions, while desktop-minority also applies on some days in e.g., the US and UK.
Mobile operating systems combine features of a personal computer operating system with other features useful for mobile or handheld use; usually including, and most of the following considered essential in modern mobile systems; a touchscreen, cellular, Bluetooth, Wi-Fi Protected Access, Wi-Fi, Global Positioning System (GPS) mobile navigation, camera, video camera, speech recognition, voice recorder, music player, near field communication, and infrared blaster. By the end of 2016, over 430 million smartphones were sold with 81.7 percent running Android, 17.9 percent running iOS, 0.3 percent running Windows Mobile and the other OSes cover 0.1 percent. Android alone is more popular than the popular desktop operating system Windows, and in general smartphone use (even without tablets) outnumber desktop use (desktop use, web use, overall is down to 44.9% in the first quarter of 2017).