Computer hardware and software system for tracking people, objects and pets using GPS data on a device on the tracked people, objects and pets; Electronic devices for animal locating and tracking programmed to use global positioning systems (GPS) and cellular communications; Global positioning system (GPS); Global positioning system (GPS) consisting of computers, computer software, transmitters, receivers, and network interface devices; GPS / GSM tracking device to be worn on the wrist of an athlete during endurance events; GPS data logger for recording trips and classifying them into different accounts; Hardware and software adapter for coupling a GPS receiver to the microphone input of a digital camcorder; Protective carrying cases specially adapted for global positioning system (GPS) apparatus; Satellite navigational system, namely, a global positioning system (GPS); Vehicle locating, tracking and security system comprised of an antenna and radio transmitter to be placed in a vehicle; Vehicle locator and recovery device programmed to use global positioning systems (GPS) and cellular telecommunications; Vehicle mounted GPS sensor for determining the rate of motion for a vehicle