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Essential Guide to Computing: The Story of Information Technology, The by E. Garrison Walters

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Four Emerging Technologies

Looking into the future, there are four key technologies that seem to have the potential to drive the progress of pervasive computing. These four technologies—3G cellular, voice and video over IP, digital television and radio, and piconets—are interrelated, and to a certain extent overlap. However, since they will impact what are (at the moment at least) different markets, we'll discuss them separately.

  • 3G cellular The first generation of cellular telephony was analog, often referred to as AMPS (Advanced Mobile Phone System). The next generation, called PCS (for Personal Communications Systems) is digital. In the United States, there are three distinct forms of PCS—two that use time division multiplexing and one that ...

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