1940 Census Symbols & Explanatory Notes

Column Number
and Heading
Codes Used Code Meaning
Column 10:
Color or Race
W
Neg
In
Chi
Jp
Fil
Hin
Kor
White
Negro
Indian
Chinese
Japanese
Filipino
Hindu
Korean
Column 11:
Age at Last Birthday
11/12
10/12
9/12
8/12
7/12
6/12
5/12
4/12
3/12
2/12
1/12
April 1939
May 1939
June 1939
July 1939
August 1939
September 1939
October 1939
November 1939
December 1939
January 1940
February 1940
Column 14:
Highest Grade of
School Completed
0
1 to 8
H-1 to H-4
C1 to C4
C-5
None
Elementary School, 1st to 8th
High School, 1st to 4th year
College, 1st to 4th year
College, 5th year or more
Column 16:
Citizenship of
the Foreign Born
Na
Pa
Al
Am Cit
Naturalized
Having First Papers
Alien
American Citizen Born Abroad
Columns 30 and 47:
Class of Worker
PW
GW
E
OA
NP
Wage/Salary Worker in Private Work
Wage/Salary Worker in Gov’t Work
Employer
Working on Own Account
Unpaid Family Worker
Column 41:
War or
Military Service
W
SSW
ROt
World War
Spanish-American War; Philippine
Insurrection or Boxer Rebellion
Spanish-American War & World War
Regular Establishment or
Peace-Time Service
Other War or Expedition

Source: http://www.archives.gov/research/census/1940/general-info.html#guide

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