GPS (Global Positioning System)

The Global Positioning System is a series of satellites owned by the US government that broadcasts signals that GPS receivers on the surface of the planet can use to determine position through triangulation. The term GPS is often used to refer to a GPS receiver, such as those used in cars and sometimes found in mobile phones.

GPRS (General Packet Radio Service)

GPRS is a wireless data standard used on GSM networks. It offers theoretical data rates as high as 120kbps on the downlink side, but real world speeds are typically significantly slower.