The Relationship Between The 1990 Census and ... - Census Bureau

Industry and Occupation
The 1990 census questionnaires obtained industry and occupation data for the employed, the
experienced unemployed, and people 16 years and over with work experience but not currently
in the labor force. For the last two categories, the data are for the most recent job that a person
held during the previous 5 years. For people who worked at two or more jobs, the data refer to
the job at which the person worked the greatest number of hours.
NAICS
North American Industry Classification System.
N.e.c.
Not elsewhere classified.
NPC
The Census Bureau’s National Processing Center in Jeffersonville, Indiana.
OMB
U.S. Office of Management and Budget.
PUMS
Public Use Microdata Samples.
Reference Week
Data about the labor force relate to the calendar week before the one in which the census
respondents completed their questionnaires or were interviewed by enumerators. The reference
week is not the same for all respondents because not all people were enumerated during the same
week. Since Census Days were April 1, 1990 and April 1, 2000, the reference weeks for many
respondents were the last week of March 1990 or March 2000, respectively.
SF- or STF-
Summary File or Summary Tape File.
SIC
Standard Industrial Classification.
SOC
Standard Occupational Classification.
SOCRPC
Standard Occupational Classification Revision Policy Committee.
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