This article briefly describes Rational Emotive or Rational Behavior Therapy. Some historical data is given regarding its developer, Dr. Albert Ellis, and his beliefs. In addition the following rational concepts are examined: (1) the anatomy of an emotion; (2) the characteristics of rational thoughts; and (3) the rational self-analysis of thoughts. Finally, 10 irrational beliefs which consistently interfere with people's ability to function appropriately are outlined. The addresses of the two most important Rational Emotive training centers are also given. (Author)