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Typical PDT. A portable data terminal (PDT) is an electronic device that is used to enter or retrieve data via wireless transmission (WLAN or WWAN).They have also been called enterprise digital assistants (EDA), data capture mobile devices, batch terminals or just portables.
Samsung Galaxy S25 Ultra - examples of mobile devices. 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.
Typical examples are smartphones and personal digital assistants (PDAs). Information appliances partially overlap in definition with, or are sometimes referred to as, smart devices, embedded systems, mobile devices or wireless devices.
The use of a QWERTY-like layout took advantage of people's memory of the computer keyboard, since each button was roughly relative to each key. At the same time, the size of the BlackBerry could be dramatically reduced, as keyboards only needed to be 5-buttons wide rather than 10-buttons wide.
A wireless application service provider (WASP) is the generic name for a firm that provides remote services, typically to handheld devices, such as cellphones or PDAs, that connect to wireless data networks.
The Palm TX. A personal digital assistant (PDA) is a multi-purpose mobile device which functions as a personal information manager. Following a boom in the 1990s and 2000s, PDAs were mostly displaced by the widespread adoption of more highly capable smartphones, in particular those based on iOS and Android in the late 2000s, and thus saw a rapid decline.
For example, Ferranti introduced a handheld application-specific mobile computer (the MRT-100) in the form of a clipboard for conducting opinion polls. [10] Boundaries that separate these categories are blurry at times. For example, the OQO UMPC is also a PDA-sized tablet PC; the Apple eMate had the clamshell form factor of a laptop but ran PDA ...
In ITU Region 2, PCS are provided in the '1900 MHz' band (specifically 1850–1995 MHz). [5] This frequency band was designated by the United States Federal Communications Commission (FCC) and Industry Canada to be used for new wireless services to alleviate capacity caps inherent in the original Advanced Mobile Phone System (AMPS) and Digital AMPS (D-AMPS) cellular networks in the '850 MHz ...
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