The Armed Services Vocational Aptitude Battery, or ASVAB for short. The ASVAB has 10 tests. Your scores from four of the tests—Word Knowledge (WK), Paragraph Comprehension (PC), Arithmetic Reasoning (AR), and Mathematics Knowledge (MK)—are combined to compute your score on what is referred to as the Armed Forces Qualification Test (AFQT). Scores on the AFQT are used to determine your eligibility for enlistment in the Army, Navy, Air Force, or Marine Corps. Scores on all of the ASVAB tests are used to determine the best job for you in the military.
For additional information about the ASVAB click here or the image below.