Occupational Classification System Manual (OCSM)
How the manual can help you — Using the OCSM
— Using the Census Index
How the manual can help you
The Occupational Classification System manual was created for Bureau of Labor
Statistics (BLS) field economists to help ensure correct occupational matches when
collecting compensation data. The public can benefit from this manual by looking up job
descriptions for occupations found in the NCS bulletins, and by knowing how the field
economist classifies the thousands of occupations into BLS Major Occupation Groups (MOGs),
e.g., Professional Occupations; sub-MOGs, e.g., Engineers, Architects, and Surveyors; or
specific occupations, e.g., Aerospace Engineers.
Following the list of Major Occupational Groups below is a link to the Census Occupation
Index. This Index presents alphabetical access to approximately 21,000 industry and 30,000
occupation titles. The Index provides a rapid way to identify a specific occupation, the MOG,
and related Census code, e.g., Accountant, B023.
Major Occupational Groups (MOGs)
MOG A
MOG B Executive, Administrative, and Managerial
Occupations
MOG C Sales Occupations
MOG D Administrative Support Occupations, Including
Clerical
MOG E Precision Production, Craft, and Repair
Occupations
MOG F Machine Operators, Assemblers, and Inspectors
MOG G Transportation and Material Moving Occupations
MOG H Handlers, Equipment Cleaners, Helpers, and
Laborers
MOG K Service Occupations, Except Private Household
Census Occupation Index
Last modified: June 26, 2002
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Bureau of Labor Statistics
