Industry Classification Systems Used By QCEW
Employment and wage data developed in the QCEW program have been classified by industry since 1938. An industrial code, based on a description provided by the employer on a questionnaire, is assigned to each establishment by the State workforce agency. If a private or government employer conducts different activities at various establishments or installations, separate industrial codes are assigned, to the extent possible, to each establishment.
The QCEW program has an extensive database of historical and current economic data. While QCEW data are not intended to be a time series, differences in classification systems may lead to perceived discontinuity in QCEW data.
Versions of classification systems
Please refer to the following links for detailed description on each version of NAICS, as well as its predecessor, the Standard Industry Classification (SIC) system.
There are no machine readable versions of that data available at this time. Data from 1938 through 1974 are available in paper copy versions through the Federal Depository Libraries. The information below was obtained from pages 146-147 in the 1974 Employment and Wages periodical published in 1975 by the U.S. Department of Labor, Bureau of Labor Statistics.
Finding your industry or industries
To search for an industry or industries, try the Industry Finder.
For more information on the classification systems
For a HTML view of the supersector and sector structure of NAICS, please refer to the QCEW supersector page.
For a composite industry list of all NAICS industry codes and titles, please visit the QCEW Industry Codes and Titles page.
For a break-down of the SIC industries, please refer to the Occupational Safety and Health Administration SIC manual. For more information on QCEW data classified under SIC or NAICS, please refer to the QCEW Data guide.
Last Modified Date: December 20, 2019