GPS means Global Positioning System which is a network of satellites that send details of their position from space to earth. GPS work. The signals are leaded by GPS receivers such as navigation devices.
They are actually used to measure the exact position, speed and time at all. It is an part and parcel technology in the modern world. GPS is well-known for its military uses. It was first developed by the US to help in its global intelligence efforts at the height of the Cold War. At first GPS system was developed in the 1960s to allow ships in the US Navy to navigate the oceans more accurately.
How to use GPS?