From its earliest uses in the US military to its role today in vehicle navigation, surveying and transport tracking, GPS has changed the way we travel, work and have fun. It has also become a crucial tool for emergency services, law enforcement officers and the monitoring of convicted criminals. Find out more about how GPS works and how this high-tech science affects your world. High-Tech Science is a series of four books that look at the revolutionary, cutting-edge science that we rely on to run our lives and keep our modern world working. It it closely linked with the Science and Design and Technology curriculums.

Author Biography

Leon Gray is a highly experienced children's book author who has written titles on many subjects, from science and geography to world issues. Before becoming an author, he worked in book publishing in London. Leon now lives in Scotland and is married with three children.