The fundamentals as well as modern approaches of control systems have been discussed in this book. Application of control theory to systems to control their behavior is known as control systems engineering. In this engineering discipline, input actuators collect the feedback generated by the output sensors to control behavior of the system under observation. The ever growing need of advanced technology is the reason that has fueled the research in the field of control systems in recent times. This book is ideal for the readers who wish to develop a better understanding of the modern applications of control systems. Coherent flow of topics, student-friendly language and extensive use of examples make this book an invaluable source of knowledge.