An introduction to Control Systems, this book provides the reader with the basic concepts of control theory as developed over the years in both the frequency domain and the time domain. The opening chapters of the book present a unified treatment of modelling of dynamic systems, the classical material on the performance of feedback systems based on the transfer function approach and the stability of linear systems. Further, various types of frequency response plots and the compensation of control systems have been presented. In particular, the trial-and-error approach to the design of lead compensators, as found in most textbooks, has been replaced by a direct method developed in the late 1970's. Moreover, the design of pole-placement compensators using transfer functions, the counterpart of the combined observer and state feedback controller, has been included for the first time in a book appropriate for undergraduate and practising engineers. This book is an attempt to aid the student remove the drudgery out of numerical computations, along with numerous worked examples and drill problems with answers to help the student in mastering the subject.