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Friday, 12 June 2015

Smartphone and personal digital assistant (PDA)

smartphone (or smart phone) is a mobile phone with an advanced mobile operating system. They typically combine the features of a cell phone with those of other popular mobile devices, such as personal digital assistant (PDA), media player and GPS navigation unit. Most smartphones have a touchscreen user interface, can run third-party apps and are camera phones. Most Smartphones produced from 2012 onwards also have high-speed mobile broadband 4G LTE internetmotion sensors, and mobile payment mechanisms.
In 2014, sales of smartphones worldwide topped 1.2 billion, which is up 28% from 2013.
personal digital assistant (PDA), also known as a handheld PC, or personal data assistant,[1][2] is a mobile devicethat functions as a personal information manager. The term evolved from Personal Desktop Assistant, a software term for an application that prompts or prods the user of a computer with suggestions or provides quick reference to contacts and other lists. PDAs were largely discontinued in the early 2010s after the widespread adoption of highly capable, in particular iOS andAndroid-based, smartphones.[3]
Nearly all PDAs have the ability to connect to the Internet. A PDA has an electronic visual display, enabling it to include a web browser, all models also have audio capabilities enabling use as a portable media player, and also enabling most of them to be used as mobile phones. Most PDAs can access the Internet, intranets or extranets via Wi-Fi or Wireless Wide Area Networks. Most PDAs employ touchscreen technology.

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