GPS chips compare signals from several geo-positioning satellites to determine position on the earth's surface. GPS is an acronym for global positioning system. GPS refers to a system of satellites and receivers that allow people and devices to pinpoint their precise location on the earth. The system relies on 24 satellites that orbit the earth twice per day. A GPS chip receives transmissions from a few of the satellites and is able to discern very precise positioning data. Different approaches for building a GPS circuit are used in a GPS receiver. A large number of components are surface mounted onto a printed circuit board (PCB). Connection from the PCB to the display unit is made using a flexible polymeric circuit board. Some parts of the device require shielding from radio waves. Computation of the receiver's location is achieved with an on-board processor. Since GPS was declared fully operational in 1993, GPS chips have become a vital global utility, indispensable for modern navigation on land, sea, and air around the world, as well as an important tool for map-making, and land surveying.