The Global Positioning System (GPS) is a satellite-based radionavigation
system owned by the United States government and operated by the United
States Air Force. It is a global navigation satellite system that provides
geolocation and time information to a GPS receiver anywhere on or near the
Earth where there is an unobstructed line of sight to four or more GPS
satellites. Obstacles such as mountains and buildings block the relatively
weak GPS signals.
The GPS does not require the user to transmit any data, and it operates independently of any telephonic or internet reception, though these technologies can enhance the usefulness of the GPS positioning information. The GPS provides critical positioning capabilities to military, civil, and commercial users around the world. The United States government created the system, maintains it, and makes it freely accessible to anyone with a GPS receiver.
Most popular use of the GPS are in Mobile Phones and Vehicle.