To track the location of devices in real-time, GPS (Global Positioning System) technology is commonly used. This system utilizes a network of satellites that send signals to GPS receivers, which calculate their exact position based on the time it takes for signals to arrive. GPS is integral for various applications, including navigation in vehicles, fleet management, and personal location tracking through mobile devices. Additionally, other technologies like cellular triangulation and Wi-Fi positioning can complement GPS for enhanced location accuracy, especially in urban environments.