This book is written for use only in the Air Force ROTC program and cannot be purchased on the open market. The book describes the historical development of aerospace industry. The first chapter contains a brief review of the aerospace environment and the nature of technological changes brought by the aerospace revolution. The following chapter discusses how ancient men learned about basic aerodynamic principles. The third chapter contains a description of how the first airplane was developed and subsequent modifications in design, speed and comfort. Finally, the evolution of spacecraft is described, as well as possible future developments in the aerospace industry. (Author/PS)