GPS data logger for recording trips and classifying them into different accounts; GPS navigation device; GPS tracking device to be worn on the wrist of an athlete during endurance events; GPS tracking devices; Computer hardware and software system for tracking people, objects and pets using GPS data on a device on the tracked people, objects and pets; Downloadable mobile applications for recording field and crop observations related to pest pressure, tracking field conditions with GPS-enabled maps, and generating crop scouting reports; 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; Hardware and software adapter for coupling a GPS receiver to the microphone input of a digital camcorder; Port security and shipping container scanning system comprising electronic x-ray scanners, video cameras and recorders, and GPS transceivers; Protective carrying cases specially adapted for global positioning system (GPS) apparatus; 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