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CPU

Definition:

The Central Processing Unit, or CPU, is often referred to as the brains of the computer. It is the part of the computer that performs all of the operations and decisions to support the computer's various functions.

Here's a word you may not know...

GPS

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.