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A personal digital assistant (PDA) is a handheld computer. PDAs are ubiquitous today, filling pockets, purses, and backpacks. In 2004, sales of handheld information technology and communication devices totaled more than $30 billion. The majority (more than 2 5 million) of "smart" handheld devices purchased worldwide were PDAs.
An estimated 25 percent of U.S. physicians use PDAs in their practices. One survey indicated that when a physician had questions about antibiotics, and could not ask a colleague, he or she used PDA-based resources more than 50 percent of the time.
There are many PDA manufacturers. They come in several forms, and have a variety of characteristics and features. However, all PDAs are small, lightweight, and have touch-sensitive screens. They can run a variety of software. Some have modified, button-style keyboards.
There are three basic types or modes of PDAs. The first type is a "stand-alone" mode, in which applications are loaded into the PDA and then accessed when needed. In "synchronized" mode, the PDA connects via an infrared or wire link to a desktop or laptop computer. Free exchange of information, including updates, is possible....