The book is targeting system design engineers who oversee hydraulic control system design whether for industrial or mobile application. The book introduces conceptual methodology to build lumped models for hydraulic components and assemble them to form a system. This book is also a great resource for mechanical engineering graduate students for their research work. This book presents models for hydraulic fluids, transmission lines, pumps, motors, cylinders, pressure relief valves, flow control valves, proportional valves, and servo valves.These models are used to assemble electro-hydraulic control systems. The book is colored and has the size of standard A4. The book is associated with a separate colored workbook. The workbook contains printed power point slides, chapter reviews and assignments. This book is the seventh in a series that the author plans to publish to offer complete and comprehensive teaching references for the fluid power industry. The book contains a total of eleven chapters distributed over 320 pages with very demonstrative figure and tables. The contents of the book are brand non-biased and intends to introduce the latest technologies related to the subject of the book.