| Short for Global Positioning System, GPS is a network of satellites that helps users determine a location on Earth. The thought of GPS was first conceived after the launch of Sputnik in 1957. In 1964 the TRANSIT system became operational on U.S. Polaris submarines and allowed for accurate positioning updates. Later this became available for commercial use in 1967. Today, with the right equipment and/or software, anyone can establish a connection to these satellites run by the U.S. government to establish his or her location within 50 to 100 feet. Also see: Absolute location, Geocaching, GIS, LBS
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