GPS has forever changed how we travel and find places. But what is the story behind this amazing technology, how does it work, and who invented it? Readers discover all this and more in this exciting and informative exploration in which they learn about the history of GPS, how it made its way from the military to public use, how it has changed the way we live, and who were the pioneering scientists behind the transformative technology. Clear explanatory text shows readers exactly how GPS works and how the tech has a role to play in every aspect of the way we navigate our planet today. Detailed sidebars set out how the technology has transformed our lives, contrasting life before and after GPS. Biographical features explain how brilliant scientists invented and developed GPS, creating a revolutionary technology that has forever changed our world. GPS is the ultimate guide to the science, the tools, and the people behind the tech that changed how we live forever.