The Standard Occupational Classification (SOC) system is a system for classifying all occupations in the economy including private, public, and military occupations. SOC is the foundation of the O-NET system and is used by all federal statistical agencies to classify workers into occupational categories for the purpose of collecting, calculating, or disseminating data.

The SOC coding structure classifies all occupations into 23 major groups. Within these major groups are 96 minor groups, 449 broad occupations, and 821 detailed occupations. The SOC system replaces all occupational classification systems previously used by federal statistical agencies.

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