United States Census Abbreviations

The following are abbreviations or codes found on various United States censuses.

Abbreviations for 1910 Census
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Military Abbreviations Column 30

 * UA.....Survivor of Union Army
 * UN.....Survivor of Union Navy
 * CA.....Survivor of Confederate Army
 * CN.....Survivor of Confederate Navy
 * }

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Race and Color

 * W.......White
 * B.......Black
 * Mu.....Mulatto
 * Ch....Chinese
 * Jp.....Japanese
 * In......Indian
 * Ot.....All Others
 * }

http://www.searchforancestors.com/records/censusabbreviations.html

Coal mining information
1920: A statistical study was done in 1923 on coal miners listed in the 1920 census. The codes used follow:

MH - coal miners who were also the heads of their households BD - coal miners who were boarders in a household BWF - coal miners who lived in their parent's household USC - coal miners who were born in the United States USW - coal miners who were born in the United States (don't know of any distinction between the w or the c)

Naturalization Information
NA: Naturalized citizen AL: Alien citizen (not a U.S. citizen) PA: Papers, meaning the alien had submitted their first papers or declaration of intent to a court of record to begin the process of naturalizing NR: No record, usually found only on soundex cards can also mean Not Registered UN: (Un)Naturalized or not Naturalized