IN 1969, the Atomic Energy Commission published a set of quality assurance system requirements for nuclear power facilities. These system requirements cover quality, reliability and safety requirements for the operation and construction of plants and for the system sub-contractors and suppliers. At about the same time, industry standards groups developed other quality system documents. Thus, there are at least five quality system requirements for atomic power plants in use at the present time. These are: 1. MIL-Q-9858 A; 2. AEC-10 CFR 50, Appendix B; 3. ASME—Section III, Article NA 4000; 4. ANSI-N-45.2, and 5. AEC-RDT-F2-2T.The purpose of this paper is to review these documents and report their salient similarities and differences. The question of developing a single quality system that will economically satisfy any one or all five of these documents is considered, and a plan for effectively accomplishing this—whether the company has five or five thousand employees—is explained.