Control systems engineering refers to a field of engineering that deals with the principles of control theory in order to create systems that produce the desired behaviors in a controlled way. It focuses on the design and analysis of systems in order to increase the stability, response speed, and accuracy of the system. Control systems engineering necessitates an extensive skill set that encompasses mechanical, electrical, and software systems. The most widely used control systems include systems for controlling temperature in a building, the speed of a conveyor belt in a process plant, and chemical concentrations in drinking water. This book outlines the processes and applications of control systems engineering in detail. It will also provide interesting topics for research, which interested readers can take up. This book is an essential guide for both academicians and those who wish to pursue this discipline further.