This title provides coverage on computers and the principles in designing digital controllers. Details on computer networking, topology, communication protocol, and a brief description of DCS are provided. New topics, like programmable logic controllers (PLCs), smart sensors and fieldbus, identification and design of nonlinear controllers are covered. Fundamentals of fuzzy logic control, design of such controllers, and use of fuzzy logic in improving the performance of conventional PID controllers are presented. Several simulation case studies are provided to illustrate the design of the digital controllers.