The 2010 Standard Occupational Classification system is used by Federal agencies to classify workers into occupational categories for the purpose of collecting, calculating, or disseminating data.

All workers are classified into one of 840 detailed occupations according to their occupational definition.

To facilitate classification, detailed occupations are combined to  form 461 broad occupations, 97 minor groups, and 23 major groups.

Detailed occupations in the SOC with similar job duties, and in some cases skills, education, and/or training, are grouped together.