Presented is an investigation of the item and factor characteristics which make up Forms 8, 9, and 10 of the Armed Services Vocational Aptitude Battery (ASVAB). Data on the ASVAB forms were collected from mulitary enlistment applications at 20 Armed Forces Examining and Entrance Stations. Item and factor analyses were conducted on samples equated in ability through the Armed Forces Qualification Test-7a. The true score theory item analyses show the subtests to have relatively easy items in most cases. Item-test biserial correlations are quite high (about .60), indicating subtest internal consistency. In keeping with these indexes, the subtest means are high, and distributions of raw scores are skewed toward the easy range. Subtest scores have high reliability as befits homogeneous groups of items. Item response theory analyses show much the same information with easy items. Test information curves are generally unimodal and skewed toward lower ability subjects. Average item information is good. The factor analyses show the six forms to be quite similar to each other and to previous ASVAB forms. Solutions with the four factors labeled Verbal, Mathematical, Vocational Information, and Clerical Speed showed a median intercorrelation of .51 with a limited range. (Author/PN)