The book has several features designed to conserve class time. First, the figures and text material are quite detailed, and I have attempted to answer questions as they might arise in the mind of the reader. Thus the lecture may be used to confirm what the student has learned, rather than to break new ground. The so-called energy conversion approach to torque has been abandoned because it requires much class time in developing concepts of use primarily to the designer. Instead, torque is taught qualitatively on the basis of conservation of power in the steady state. Finally, each device is discussed in terms of magnetic fields first, voltages second. This sequence makes it unnecessary to back track in order to explain the origin of the flux that generated the voltage.