Handheld and Portable Computers

Handheld and portable computers are small, lightweight computers that are designed to be operated while held by hand or from a desk or tabletop. They contain a processor, memory, I/O ports, and expansion slots. They also provide an operating system, user interface, and battery power. There are three basic types of handheld and portable computers. Tablet personal computers (PCs) are notebook computers that feature a liquid crystal display (LCD) on which users can write with a special pen called a stylus. Tablet PCs digitize handwriting and often include a keyboard or mouse. Personal digital assistants (PDAs) are smaller than tablet PCs, but also include a stylus or keyboard. Typically, PDAs function as a cellular phone, fax sender, Web browser, and personal organizer. They may also provide handwriting recognition and voice recognition technologies. Pocket PCs, a third type of handheld and portable computers, are advanced PDAs with low power processors, brilliant trans-reflective color screens, wireless communication features, and many add-on options. Pocket PCs have one or more expansion slots for added memory. 

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