Abstract : Much of the early history of rocket propulsion has not been the subject of organized historical documentation, and with the passage of time, and proliferation of organizational changes, the prospects for developing a clear picture of past events and fading. These papers, and the book, upon which it is based, attempt to rectify this situation to the maximum extent possible - at least from the viewpoint of one of the major players in the field. Aerojet's role in solid propellant rocketry is described for the period of 1942 through the 1990s. The subject is addressed in terms of programs and technology, and an attempt is made to include insights into the industry, competitive, customer, and applications aspects. origins of some of the basic enabling technologies are described, especially in terms of propellants, motor cases, and the many innovative control concepts that have given solid rockets much of their versatility.