California Cancer Reporting System Standards Volume I: Abstracting and Coding Procedures
The usual (longest-held) occupation and industry of workers can reveal the national cancer burden by industry and occupation. Such information can also be used to help discover jobs that may have a high risk for cancer or other diseases and for which prevention efforts can be concentrated (or targeted).
Enter any available information about the industry associated with the longest held occupation (e.g., automotive repair, junior high school, trucking, house construction), up to 100 characters.
If the chart identifies the employer's name but does not describe the industry, enter the employer's name (and city if available).
If only an abbreviation is given for the industry or employer (e.g., PERS, USD, or FDIC), record it even if its meaning is not known (avoid the use of abbreviations where possible).
If no information is available, enter "NR" (not recorded). Do not leave this field blank.
Please refer to http://www.cdc.gov/niosh/docs/2011-173/