A mobile device or handheld device is a computer small enough to hold
and operate in hand. Mobile devices are typically battery-powered and possess
a flat-panel display and one or more built-in input devices, such as a
touchscreen or keypad. Modern mobile devices often emphasize wireless
networking, to both the Internet and to other devices in their vicinity, such
as headsets or in-car entertainment systems, via Wi-Fi, Bluetooth, cellular
networks, or near-field communication.
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