Electronic devices for detecting and locating pets using RFID; Electronic location and immobilization devices installed after purchase for use with vehicles; Transmitter and receiver used to locate lost pets; Global positioning system; 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; GPS data logger for recording trips and classifying them into different accounts; Electronic devices for animal locating and tracking programmed to use global positioning systems (GPS) and cellular communications; Global positioning system (GPS); GPS tracking devices; Global positioning system receivers; Global positioning system (GPS) apparatus; Wearable global positioning system (GPS); Sensors for determining position, velocity, acceleration and temperature; Electronic devices used to locate lost articles employing the global positioning system or cellular communication networks