Figure 3-3.2:  Selective Service System Classifications for WWI, WWII, and PWWII through 1976
 
SELECTIVE SERVICE CLASSIFICATIONS
WWI period:  (beginning May 18, 1917)
Class I - liable for military service
Class II thru V - temporarily exempted or discharged from draft.
WWII period:  (October 4, 1940 to January 17, 1947)
CLASS
DESCRIPTION
I-A  Available for military service
I-A(B)  Acceptable for military service, below
   standards for general military service
I-A(L)  Available for limited military service
I-A-O  Available for noncombatant military service
   (conscientious objectors)
I-A-O(B)  Acceptable for noncombatant military service,
   below standards for general military service
   (conscientious objectors)
I-A-O(L)  Available for noncombatant limited military
   service (conscientious objectors)
I-A rem.  Available for military service after
   correction of defects
I-A-O rem.  Available for noncombatant military service
   after correction of defects (conscientious
   objectors)
I-B  Available for limited military service
I-B-O  Available for noncombatant limited military
   service (conscientious objectors)
I-B rem.  Available for limited military service after
   correction of defects (conscientious objectors)
I-B-O rem.  Available for noncombatant limited military
   service after correction of defects
I-C Ind.  Inducted member of armed forces
I-C Enl.  Enlisted member of armed forces
I-C Disc.  Discharged (honorably) from the armed forces
I-C Dec.  Deceased while in Class I-C
I-D  Deferred student, fit for general military service
I-D-O  Deferred student, fit for general noncombatant
   military service
I-E  Deferred student, fit for limited military service
I-E-O  Deferred student, fit for limited noncombatant
   military service
I-G  Member of or honorably separated from armed forces of
   cobelligerent nation (later extended to include
   registrants separated from American Field Service
   or Merchant Marine, and persons interned by an
   enemy nation)
I-H  Deferred, aged 28 or over
II-A  Deferred in support of national health, safety,
   or interest
II-A(L)  As II-A, but found qualified for limited military
   service
II-A(F)  As II-A, but rejected for military service
II-B  Deferred in war production
II-B(L)  As II-B, but found qualified for limited military
   service
II-B(F)  As II-B, but rejected for military service
II-C  Deferred in agriculture
II-C(L)  As II-C, but found qualified for limited military
   service
II-C(F)  As II-C, but rejected for military service
III-A  Deferred for dependency reasons
   (reestablished 11-15-45)
III-B  Deferred both by reason of dependency and
   occupation essential to the war effort
III-C  Deferred both by reason of dependency and
   agricultural occupation
III-D  Deferred by reason of extreme hardship and
   privation to wife, child, or parent
IV-A  Man who has completed service.  (This classification
   was applicable in time of peace only.)
IV-A  Man deferred by reason of age.
  11-18-42:  age 45 and over
  10-05-44:  age 38 and over
  08-31-45:  age 26 and over
  07-17-46:  age 30 and over
IV-B  Official deferred by law
IV-C  Alien not acceptable to armed forces and
   certain neutral aliens
IV-D  Minister of religion or divinity student
IV-E  Conscientious objector, available for or assigned
   to work of national importance
IV-E(B)  Conscientious objector, under 26 years of age,
   acceptable under lowered physical standards for
   work of national importance
IV-E-H  Conscientious objector deferred by reason
   of age (over age 27)
IV-E(L)  Conscientious objector qualified for limited
    service
IV-E-LS  Conscientious objector available for limited
   service in civilian work of national importance
IV-E-S  Conscientious objector who would otherwise be
   in Class I-D or I-E
IV-E Disc.  Conscientious objector separated from work of
   national importance by issuance of a Certificate
   of Release
IV-E Sep.  Conscientious objector separated from work of
   national importance other than by issuance of
   a Certificate of Release or of death
IV-E Dec.  Deceased while in Class IV-E
IV-F  Rejected for military service; physical, mental,
   or moral reasons
IV-H  Deferred, age between 38 and 45
Suffix "(H)"  Added to classification, such as II-A(H),
 to identify registrants aged 38-44 incl.
January 18, 1947 thru 1948 - No draft
PWWII period:  (1948 thru 1976*)
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

 
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.

 
THE SELECTIVE SERVICE NUMBER
First element: State code
  Second element: Local board number
Third element: Year of birth of the registrant
Fourth element: Numerical sequence of registrant with his specific local board for his specific year of birth