1-A	Available for military service
1-AM	Medical specialist available for military service
1-A-O	Conscientious objector available for noncombatant military service
1-A-OM	Medical specialist conscientious objector available for noncombatant military service.
1-C	Member of the Armed Forces of the United States, the Coast and Geodetic Survey, or the Public Health Service (Enl) - enlisted; (Ind) - inducted; (Dis) - discharged
1-D	Member of a Reserve component or student taking military training
**1-H	Registrant not currently subject to processing for induction or alternate service.
1-O	Conscientious objector available for civilian work contributing to the national health, safety or interest
1-OM	Medical specialist conscientious objector available for civilian work contributing to the national health, safety or interest
1-S	Student deferred by statute - (H) high school; (C) college
1-W	Conscientious objector performing civilian work in the national health, safety or interest (Rel) - released
***1-Y	Registrant qualified for service only in time of war or national emergency
2-A	Registrant deferred because of civilian occupation (except agriculture)
2-AM	Medical specialist deferred because of critical community need involving patient care
2-C	Registrant deferred because of agricultural occupation
2-D	Registrant deferred because of study in preparation for the ministry
2-M	Registrant deferred for medical study
2-S	Registrant deferred because of activity in study
3-A	Registrant with a child or children; or registrant deferred by reason of extreme hardship to dependents
4-A	Registrant who has completed service; or sole surviving son
4-B	Official deferred by law
4-C	Alien
4-D	Minister of religion or divinity student
4-E	Conscientious objector opposed to both combatant and noncombatant training and service
4-F	Registrant not qualified for military service
4-FM	Medical specialist not qualified for military service
4-G	Sole surviving son
4-W	Conscientious objector who has completed civilian alternate service
5-A	Registrant over the age of liability for military service
Note: A notation of "(M)" or "-M" written in upper or lower case following a classification, indicates the registrant was married.
*	Roman numerals I, II, III, IV, V were sometimes used
**	With the cessation of registrant processing in 1976, all registrants (except for a few alleged violators of the Military Selective Service Act) were classified 1-H regardless of any previous classification.
***	The 1-Y classification was abolished December 10, 1971. Local boards were subsequently instructed to reclassify all 1-Y registrants by administrative action.