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1). GPS Pet Tracking If you have a dog or cat that is an escape artist with cross-country travel on its mind, you might want to consider a GPS pet--tracking device 2). Free GPS Software I took a look at some of the online offers for free GPS software and found, like many "free" offers there were often limits and provisos involved. Of 3). GPS Cell Phones Motivated by the events of 9/11 2001 and problems with 911 calls from cellular phones, the FCC requires that by the end of 2005 all cell phone carrie 4). How GPS Works Global Positioning System (GPS) is a navigational aid originally developed for the military. The system simply receives signals. It is the applied te