Mobile Devices are known as a handheld device, handheld computer or just handheld. Mobile devices are small, hanheld computing devices, that usually have touch input or mini keyboard. Usually weighs under two pounds. Handheld computing devices have an operating system (OS). Handheld computing systems are able to operate many application software, or apps< at the same time. May be used with WI-FI, Bluetooth and GPS capabilities that connections to the Internet and Bluetooth capable devices like automobile headset or microphone headset. These devices come with stable battery power source called lithium battery. They also come with a camera or media player that allows video or music files. You could also get integrated data that captures devices like barcode, RFID and smart card readers.