The selection of an appropriate test battery is based on its content and applicability to the vocational trainee population. This report describes the testing of a national sample of U.S. high school students with an established version of Armed Services Vocational Aptitude Battery (ASVAB), and a new, enlarged version of the same test battery. Correlation matrices and conversion tables were generated by equating components of the old form of the test with scales and components in the new version. The research methodology and findings were described, compared, and contrasted to the two test measures. Correlation and factor analyses were executed which showed four component factors. These are described and used to identify the vocational aptitude contents of the two tests. (Author/DSE)