INDUSTRY AND OCCUPATION CODING
Coding Support Documents
Here you will find documents on industry and occupation (I&O) coding classifications, instruction manuals for using NIOCCS (our I&O coding software), and I&O crosswalks. Crosswalk coding is the mapping of a code from one I&O classification coding scheme to another or to a different code within the same I&O coding scheme for a different year. If you have questions about any of these materials, please contact us at NIOCCS@cdc.gov.
NIOCCS Input File Formats
I&O Autocoding
- Input File Format for Uploading to NIOCCS
- Example I&O Input File in Excel formatCdc-excel
- Example I&O Input File in .txt formatCdc-txt
Crosswalk Coding
I&O Crosswalks
- Census 2002 Industry to NAICS IndustryCdc-excel
- Census 2002 Occupation to SOC OccupationCdc-excel
- Census Industry Crosswalks 1990, 2000, 2002, 2007Cdc-excel
- Census Occupation Crosswalk 2002 to 2010Cdc-excel
- Census Occupation Crosswalk 2000 to 2002Cdc-excel
- Census Occupation Crosswalk 1990 to 2000Cdc-excel
- NAICS Revision CrosswalksExternal
- Census Code Lists & Crosswalks MethodologyExternal
Page last reviewed: March 6, 2019
Content source: National Institute for Occupational Safety and Health