The Ball Aptitude Battery (BAB) is a multiple ability test battery of specific work skills. It is designed for use in career counseling and personnel selection. The 14 BAB tests yield 16 ability scores: Clerical, Idea Fluency, Tonal Memory, Pitch Descrimination, Inductive Reasoning, Word Association, Writing Speed, Paper Folding, Vocabulary, Ideaphoria, Finger Dexterity-Left, Finger Dexterity-Right, Grip-Left, Grip-Right, Shape Assembly, and Analytical Reasoning. An additional musical rhythm test (adapted from Seashore, Lewis, and Saetveit) is also included. As part of longitudinal validity studies of the BAB by the Aptitude Validation Research project, this report presents percentile norms for each ability for eight occupational groups: accountants (n=64), airline pilots (n=19), Ball Company employees (n=61), carpenters (n=194), clerical workers (n=29), horticultural students (n=95), high school students (n=1028), and teachers (n=93). Sample sizes, means, and standard deviations for each BAB test and occupational group are given at the end of each section. (BS)