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GPS navigation systems use a network of geosynchronous satellites that orbit the earth to determine the location of people or objects within a few feet of their location. GPS systems were first used to help the military in target location and in navigation. More recently the cost of GPS hardware has fallen, allowing accurate civilian use; this is also due to the enhancement of signal quality by the military.

The technology of GPS has been of great benefit to companies for keeping track of the vehicles within their fleets and also providing a way for drivers to be more efficient in making deliveries and estimating time of delivery. GPS tracking systems for vehicles have even been useful for finding the best way for drivers to get to their locations.

One possible negative point about GPS devices is the issue of possible invasion of privacy. GPS is used to catalog and analyze the activity of truck drivers already, and since GPS has been used in espionage for quite some time, we also know that it is an effective method of tracking individual people.

GPS has also made significant inroads into the consumer market, allowing individuals to use GPS to lay out waypoints for hikes, set locations for camping or fishing, and allow individuals to navigate in unfamiliar territory. A new form of recreation called "geocaching" has also developed, involving a hide-and-seek game involving a container and a set of latitude and longitude coordinates.

A new and highly desirable automobile add-on is the GPS tracking system. Located in the dashboard, the GPS receiver eliminates the awkwardness of trying to read a map while driving by processing a driver's location request and giving spoken or visual directions. Other useful features are now being added to these devices, such as information on restaurants and hotels.

Usage of GPS technology is very likely to become more prevalent as the price of the devices continues to decrease. The ubiquity of GPS in today's world may render older technologies such as paper maps, obsolete. GPS systems may also serve as a springboard for future technological developments, such as property theft deterrence, by being able to track at all times all of one's possessions.

Satellites allow GPS units to locate and track objects and people. GPS was first used by the United States military for targeting and navigation. Accuracy of the GPS signal for the general public has improved since the military stopped degrading the signal available to civilians. Delivery companies make widespread use of GPS vehicle tracking systems for scheduling and route efficiency. In private automobiles, GPS tracking systems simplify navigation. Outdoor enthusiasts have made GPS devices common in recreational pursuits. "Geocaching" is a hobby that uses a GPS tracking device to find hidden treasures. As prices drop, the use of the GPS system will continue to render older methods of navigation obsolete.