A book on this subject in the manner in which it has been presented was long over due. Almost every engineering industry uses fluid power products in one form or the other and there are not many books around to expose practicing engineers, technicians and students to the art and science of this vital technology. The author has made conscious efforts to enable the reader with degree or diploma level education to master this technology by emphasizing less on what he has already been taught and more on what he needs to know. This book therefore in itself is sufficient to understand and master the basic industrial hydraulic system. There are many number of illustrations, circuit diagrams and solved problems. In application engineering the author explains and justifies the system design and the hydraulic components chosen to perform a particular task.