The Second Edition to this text, which is largely revised and updated version of Introduction to Linear and Digital Control Systems by the same author, continues to build on the fundamental concepts covered earlier. The text discusses the important concepts of control systems, transfer functions and system components. It describes system stability, employing the Hurwitz–Routh stability criterion, root locus technique, Bode plot and polar and Nyquist plots. In addition, this student-friendly book features in-depth coverage of controllers, compensators, state-space modelling, and discrete time systems. The book is designed for undergraduate courses in control systems for electrical engineering, electronics and instrumentation, electronics and communication, instrumentation and control, and computer science and engineering courses. NEW TO THIS EDITION New chapter on Relevant Mathematics. Incorporates many more worked-out examples mostly related from the GATE exams on Instrumentation Engineering over the last several years. Text refined, wherever felt necessary, to make it more student friendly.