This document provides an introduction to a power systems engineering course. It discusses the key components of power systems including generation, transmission, distribution and control. It notes the ideal components are not realized in practice and complications can arise. Additional sections cover concepts like power, energy, examples of power systems, the electric system context within total energy delivery, generation sources in the US and examples states, and economics considerations. A brief history of electric power development and the move toward deregulation of the industry is also presented.