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'''Global positioning system''' ('''GPS''') is a [[United States]] [[satellite]] system that lets those on the ground, on the water or in the air determine their position with extreme accuracy using GPS receivers. [[Category:Telecommunications]]
'''Global positioning system''' ('''GPS''') is a [[United States]] [[satellite]] system that lets those on the ground, on the water or in the air determine their position with extreme accuracy using GPS receivers.
The system was developed by the US [[Department of Defense]] and made available to the general public in 1983 under orders of [[President Reagan]]. GPS for civilian use used to include a mechanism called Selective Availability that intentionally limited the accuracy of GPS, a mechanism originally intended to confuse potential enemies who might launch a missile attack, but Selective Availability was disabled in 2000.
[[Category:Telecommunications]]