Evolution of Wireless Networks
•The year 1999 saw the introduction of the first “wireless” connections to the Internet.
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•Personal digital assistant (PDA):  a handheld computer that can send and receive wireless telephone and fax calls, act as a personal organizer, perform calculations, store notes, and download Web pages formatted for handheld devices.
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•The wireless Internet has expanded to include different hardware devices, networks, and other options.