This book provides an introduction to many aspects of computer control. It covers techniques or control algorithm design and tuning of controllers; computer communications; parallel processing; and software design and implementation. The theoretical material is supported by case studies covering power systems control, robot manipulators, liquid natural as vaporisers, batch control of chemical processes; and active control of aircraft. The book is suitable for practising engineers, postgraduate students and third year undergraduates specialising in control systems. It assumes some knowledge of control systems theory and computer hardware.