Industry and Occupation Classification System

The Industry and Occupation Classification System was developed primarily for use in classifying a respondent's industry (employer's type of business) and occupation (employee's type of work) as reported in the Census 2000, the Current Population Survey, the American Community Survey, and other demographic surveys conducted by the Census Bureau.

Author: U.S. Census Bureau

http://www.census.gov/hhes/www/ioindex/ioindex.html

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