| 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
