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GPS: Global Positioning System

GPS stands for Global Positioning System. It was developed by the Department of Defense in the 1980's.
The system is now being widely used by civilians everyday. The GPS system sends microwave signals to a receiver, that gives it it's location.
GPS works on the principle of triangulation.

Here is how the data looks coming out of a GPS unit. This example is one of a GPRMC sentence, which is one of the most common outputs by a GPS unit, is described below.