Global Positioning System Directory
Global Positioning System or GPS, as it is most commonly known, is a satellite navigation system which was developed by the United States’ Department of Defense. The satellites transmit microwave signals that enable the GPS receivers to determine the current location, time and velocity of the satellites. Even though this technology was a military based invention, it is accessible and available to the common people. It is often used by civilians as navigation system on the ground. Software applications for GPS are available in many cell phones and cars, which provide driving or walking instructions to people. GPS has come quite popular as it allows people to navigate without getting lost. If a person is in a new city or country, then he or she can move in the city without getting lost. All a person needs to do is enter the name of the destination, and the GPS will navigate and direct him or her to that place.