Research programs were conducted involving the experimental testing of 2000 enlisted men, 1200 officers, and 1200 ROTC cadets. At the start of the program, major attention was given to development and evaluation of measures to select enlisted personnel for rotary wing training, including preflight (OCS- type) training to prepare graduates for warrant officer commissioning. A number of interim test batteries, both fixed-wing and rotary-wing, were developed and operationally implemented. In 1963, recommendation was made for the consolidation of the separate selection procedures into a comprehensive program. The report summarizes the important stages in the separate fixed-wing and rotary-wing research and the more recent effort by which results were integrated in the development of a comprehensive selection program.