The book considers the basic aspects of flexible manufacturing systems (FMS) and numerical control of machine tools used in FMS installations. The problems of organization of hierarchical FMS structures are treated in combination with the tasks of planning and control of production processes. The text also describes microprocessor-based NC systems, machine tool drives, control and diagnostic methods, and problems involved in the organization of local area networks (LAN) in flexible manufacturing. The book is intended for specialists engaged in automation of production processes in mechanical engineering.