This two-volume work provides a total of sixty-five chapters, which are divided into seven parts. Volume 1 contains four parts and focuses on the satellite navigation systems and non-satellite based navigation technologies, while Volume 2 has three parts and addresses advanced satellite navigation civilian applications. Volume 1 starts with an introduction chapter which provides an overview of the contents of the set, a historical perspective of GPS development, and other related PNT development. Volume 2 ends with a chapter which summarizes the set and offers an outlook on the future of PNT technologies and applications.