Adult norms are shown as cutting scores for each of the aptitudes judged significant for a given occupation. Tables for converting adult scores to their ninth and tenth grade equivalents are included. The standard error of measurement is reported for each of the nine aptitudes of the General Aptitude Test Battery (GATB): intelligence, verbal aptitude, numerical aptitude, spatial aptitude, form perception, clerical perception, motor coordination, finger dexterity, and manual dexterity. The bulk of this revised test manual contains the following: (1) an alphabetical index to aptitude test batteries used by all state employment agencies, and to the Occupational Aptitude Pattern Structure; (2) an industrial index to the same; (3) minimum appitude requirements in each of the nine measured aptitudes for approximately 450 occupations. The Dictionary of Occupational Titles code number and the number and date of a pertinent technical report are also given for each occupation. (CP)