This basic book on automatic control consists of seven chapters. The first chapter introduces general concepts of systems, signals and control systems. The second chapter describes the different types of system representation as differential equations, transfer functions and transfer loci. It also includes the characteristics of first- and second-order systems. Chapter three covers methods for reducing function diagrams and calculating transfer functions, whatever their complexity. Chapter four presents the calculation of the accuracy of any control system, in the presence or absence of disturbances. Chapter five covers various methods, both analytical and graphical, for analyzing stability. Chapter six introduces some control methods, including phase lead compensation, integral action procedures, and standard PID controllers, with tuning techniques such as the reference model and pole-zero compensation method. The seventh and final chapter of this book is devoted to a number of implementation examples addressing various problems encountered in the context of continuous linear control systems. Additional exercises are included at the end of the book.