The Global Positioning System (GPS) is a space-based positioning, navigation and timing (PNT) system originally developed by the Depart- ment of Defense of the United States government in early 1970s.1
Han, Sang Wook Daniel
"Global Administrative Law: Global Governance Of The Global Positioning System And Galileo,"
ILSA Journal of International & Comparative Law: Vol. 14
, Article 2.
Available at: http://nsuworks.nova.edu/ilsajournal/vol14/iss3/2