This attachment contains the following PDF files of sets of Industry and Occupation code schemes:
1970 Census 3-Digit Industry and Occupation Codes (PDF). All occupations and industries (except military occupational specialties) are coded with 1970 codes. This is the main set of codes.
1980 Census 3-Digit Industry and Occupation Codes (PDF). Beginning with the 1982 survey the respondent's current or last job only is coded with the 1980 codes in addition to the 1970 codes.
2000 Census 3-Digit Industry and Occupation Codes (PDF). The 2000 Census codes were used to code industry and occupation for all jobs in the 2002 NLSY79 survey. Census published slightly revised codes in 2002, and these revised codes were used to code all jobs in the 2004 survey. Census issued another revision in 2003, and these codes were used for the 2006 survey. This attachment lists the 2000 codes, followed by the 2002 and 2003 codes; the 2002 tables note the slight differences from the 2000 list.
1977 Department of Defense 3-Digit Enlisted Occupational Classification System (PDF). All military occupational specialties collected in the military section are coded with this scheme.