INDUSTRY AND OCCUPATION CODING
Coding Support Documents
Here you will find documents on industry and occupation (I&O) coding classifications 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.
![Instruction Manual Icon](/niosh/topics/coding/images/nioccsud-input.jpg)
NIOCCS Input File Formats
![nioccs I&o cross](/niosh/topics/coding/images/nioccsud-cross.jpg)
I&O Crosswalks
- Census Industry Crosswalk 2007 to 2012
- Census 2002 Industry to NAICS Industry
- Census 2002 Occupation to SOC Occupation
- Census Industry Crosswalks 1990, 2000, 2002, 2007
- Census Occupation Crosswalk 2002 to 2010
- Census Occupation Crosswalk 2000 to 2002
- Census Occupation Crosswalk 1990 to 2000
- NAICS Revision Crosswalks
- Census Code Lists & Crosswalks Methodology