LORAN and the Decca Navigator, developed in the early 1940s and were used during World War II.

1983
In 1983, after Soviet interceptor aircraft shot down the civilian airliner KAL 007 in restricted Soviet airspace, killing all 269 people on board, U.S. President Ronald Reagan announced that the GPS system would be made available for civilian uses once it was completed.

1989
On February 14, 1989, the first modern Block-II satellite was launched.

Old Satellite Orbiting Earth

Global Positioning System, formally known as the Navstar Global Positioning System, was initiated as a joint civil/military technical program in 1973

The first experimental Block-I GPS satellite was launched in February 1978. The GPS satellites were initially manufactured by Rockwell International and are now manufactured by Lockheed Martin.

GPS which serves both civilians and the military, relies on a system of 32 satellites that sent signals for positioning and timing .

most of the people use GPS to find their way specially when they are not on the marked trails.

GPS can be used as valuable tool by the law enforcement to track criminals , terrorists .

GPS tracking can be used by parents to keep tap on their children to make sure that they are safe.

all well as navigation GPS can also be used to provide information on the local areas , finding out were is hotels ,gas station is.