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 formatexcel icon
- Example I&O Input File in .txt formattxt icon
Crosswalk Coding
I&O Classifications
I&O Crosswalks
- Census Industry Crosswalk 2007 to 2012excel icon
- Census 2002 Industry to NAICS Industryexcel icon
- Census 2002 Occupation to SOC Occupationexcel icon
- Census Industry Crosswalks 1990, 2000, 2002, 2007excel icon
- Census Occupation Crosswalk 2002 to 2010excel icon
- Census Occupation Crosswalk 2000 to 2002excel icon
- Census Occupation Crosswalk 1990 to 2000excel icon
- NAICS Revision Crosswalksexternal icon
- Census Code Lists & Crosswalks Methodologyexternal icon
Page last reviewed: June 3, 2020
Content source: National Institute for Occupational Safety and Health