A mobile device (also known as converged device, handheld device,
handheld computer, "Palmtop" or simply handheld) is a pocket-sized
computing device, typically comprising a small visual display screen for user output
and a miniature keyboard or touch screen for user input. In the case of the personal
digital assistant (PDA) the input and output are combined into a touch-screen interface.
Smartphones and PDAs are popular amongst those who require the assistance and convenience
of a conventional computer, in environments where carrying one would not be practical.
Due to the varying levels of functionality associated with mobile devices, in 2005
T38 and the DuPont Global Mobility Innovation Team proposed the following standardized
definition of mobile devices:
- Limited Data Mobile Device: devices that have a small, primarily text-based
screen, with data services usually limited to SMS (Short Message Service) and WAP access.
Typical examples of these devices are
cellular phones.
- Basic Data Mobile Device: devices that have a medium-size screen (typically
between 120 x 120 and 240 x 240 pixels), menu or icon-based navigation via a thumb-wheel
or cursor, and which offer access to e-mail, address book, SMS, and a basic web browser.
Typical examples of these devices are BlackBerry and Smartphone.
- Enhanced Data Mobile Device: devices that have medium to large screens (typically
above 240 x 120 pixels), stylus-based navigation, and which offer the same features as the
"Basic Data Mobile Devices" plus native applications such as Microsoft Office Mobile
applications (Word, Excel, PowerPoint) and custom corporate applications such as mobilized
versions of SAP, intranet portals, etc. Typical devices include those running Windows
Mobile 2003 or version 5, such as Pocket PCs.
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