Book excerpt: The book considers digital equipment for automatic control and measurement of production processes. It presents the basic characteristics and describes the operating principles of automatic digital instruments, machines for centralized control, and automatic control machines. Basic attention is given to digital equipment using ferrite and semiconductor components. The book is intended for engineers and technicians concerned with the development and use of automation resources; it can also be useful to students in higher educational institutions and technicums specializing in instruments and systems of automatic control. (Author).