The purpose of this research is to examine the factor structure of the Armed Services Vocational Aptitude Battery (ASVAB), Forms 8, 9, and 10. The ASVAB consists of ten subtests: General Science; Arithmetic Reasoning; Word Knowledge; Paragraph Comprehension; Numerical Operations; Coding Speed; Auto Shop Information; Mathematics Knowledge; Mechanical Comprehension; and Electronics Information. This investigation compared the ASVAB 8/9/10 factor structure to the factor structure observed for previous samples and previous forms of the ASVAB. It also examined the similarity of ASVAB factor structure for racial, ethnic, and sex subgroups. A factor analysis of a sample of male and female Army applicants yielded four orthogonal factors accounting for 93 percent of the total variance: Verbal Ability, Speeded Performance, Quantitative Ability, and Technical Knowledge. Factor analyses of male, female, White, Black, and Hispanic subgroups yielded similar results. (Author/DWH)