Location Location Location

Right now there are thirty-one satellites zipping around the world with nothing better to do than help you find your way to the grocery store. The Global Positioning System (GPS), originally developed by the military but then converted to civilian use, beams highly precise time signals to Earth-based receivers such as the one in your Android phone. With good reception and a little math, the GPS chip can figure out your position to within 50 feet.2

1. http://www.androidlocale.com

2. You don't have to know how GPS works to use it, but if you're curious, see http://adventure.howstuffworks.com/gps.htm.

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