This paper summarizes the 1984 Fusion Power Demonstration (FPD) design study. Three major configurations were investigated. Two were based on the Mirror Advanced Reactor Study (MARS) end cells, which use “C” coil magnets in Yin-Yang pairs to help stabilize the plasma. The third configuration utilized an octopole in the end cell. Detailed studies of major components were underaken and critical issues were identified and examined. Integrated configuration drawings of each of the machines were prepared and are presented here. A Tandem Mirror Reactor Systems Code (TMRSC) was assembled for use in optimizing future device designs but will not be discussed. The various sections of this paper address the mission, goals, and brief design descriptions of the three configurations.