GPS
Definition:
GPS stands for Global Position System. GPS is a series of satellites orbiting the earth that can be utilized by GPS receivers to help pinpoint an exact location. The most common consumer uses of GPS include navigation systems in automobiles to map driver's routes and mobile phones to determine the location of a caller placing an emergency call.
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high definition television
High definition television (HDTV) provides a much higher-quality television picture and audio than a standard television. High definition programming also differs from standard television programming in that it is delivered using a digital signal as opposed to an analog signal and has an aspect ratio of 16:9 vs. 4:3 for standard television. The wider aspect ratio is what gives high definition television its widescreen look and feel.