Articles - GPS en-us http://www.e-topic.com N/A http://www.e-topic.com e_topic@yahoo.co.uk 20 http://www.e-topic.com/articles/3509/1/GPS-Basic-Information/Page1.html Get to know the basic history and how it works the Global Positioning System. Also known as GPS. robertoms2003@hotmail.com (Roberto Sedycias) Mon, 10 Dec 2007 00:00:00 -0600