Principles of operation and design of pumps and fans, general questions of theory of centrifugal superchargers, dimensional and dimensionless characteristics of pumps and fans, regularities of superchargers operation in the network are considered. The joint operation of pumps and fans in the network is described. Methods of supercharger operation control are presented. Questions of calculation theory and design of piston, centrifugal and axial compressors are described. Examples of construction of characteristics of superchargers and network, selection of pumps and fans, calculation of optimal operating modes of superchargers are given.