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Wearable computing is the study or practice of inventing, designing, building, or using miniature body-borne computational and sensory devices. Wearable computers may be worn under, over, or in clothing, or may also be themselves clothes (i.e. "Smart Clothing" (Mann, 1996a)).

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Digital text is delivered on a computer or another device to meet the needs of students with sensory, physical, or learning and reading disabilities. ... When digital text is delivered via accessible technologies, it can be of benefit to students with many different types of needs.

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a news and information service in the form of text and graphics, transmitted using the spare capacity of existing television channels to televisions with appropriate receivers.

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Digital radio is the use of digital technology to transmit or receive across the radio spectrum. Digital transmission by radio waves includes digital broadcasting, and especially digital audio radio services.

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an office equipped to handle a large volume of telephone calls for an organization (such as a retailer, bank, or marketing firm) especially for taking orders or for providing customer service.

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GPS is a system of 30+ navigation satellites circling Earth. ... A GPS receiver in your phone listens for these signals. Once the receiver calculates its distance from four or more GPS satellites, it can figure out where you are. Earth is surrounded by navigation satellites.

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A fax machine is designed to both send and receive documents so it has a sending part and a receiving part. ... The phone line transmits this information almost instantly to a fax machine at the other end. It receives the electrical pulses and uses them to control a printer.