In addition to West Point, Annapolis, and the Air Force and Coast Guard academies, the United States Armed Forces draw candidates for commissioned officers from several sources. A significant number of officer trainees are promoted from the military ranks, receiving their commissions as second lieutenants or ensigns after completing Officer Candidate School (OCS) or Officer Training School (OTS) programs. This brand-new manual prepares candidates to pass the acceptance tests for those schools. It offers a general overview of the exams and presents in-depth reviews of all test topics, which include math knowledge and reasoning, word knowledge and reading comprehension, and general science. Candidates will also find reviews in specialized topics, including electronic information, mechanical and spatial comprehension, and flight aptitude. The manual concludes with full-length practice tests as follows: one Air Force Officer Qualifying Test (AFOQT); one practice test for Army OCS applicants; one practice test for Marine Corps OCS applicants; and one practice test for Navy OCS Applicants and Marine Corps/Coast Guard Aviation applicants. All tests come with answer keys.