SmartPhone
A smartphone is a full-featured mobile phone with personal computer like functionality. Most smartphones are cellphones that support full featured email capabilities with the functionality of a complete personal organizer. An important feature of most smartphones is that applications for enhanced data processing and connectivity can be installed on the device, in contrast to regular phones which support sandboxed applications. These applications may be developed by the manufacturer of the device, by the operator or by any other third-party software developer. "Smart" functionality includes any additional interface including a miniature QWERTY keyboard, a touch screen, or even just secure access to company mail, such as is provided by a BlackBerry.
Smartphones can be noted by several features which include, but are not limited to, touchscreen, operating system, and tethered modem capabilities on top of the default phone characteristics. Full-fledged email support seems to be a characteristic key defining feature found in all existing and announced smartphones as of 2007. Most smartphones also allow the user to install extra software, even from third party sources, but some phones vendors like to refer to their phones as "smartphones" even without this feature.
Smartphone features tend to include Internet access, e-mail access, scheduling software, built-in camera, contact management, accelerometers and some navigation software as well as occasionally the ability to read business documents in a variety of formats such as PDF and Microsoft Office.
http://en.wikipedia.org/wiki/Smartphone
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