Industrial and occupational classifications
The UK Standard Industrial Classification of Economic Activities (SIC) is used to classify industries by the type of activity they do.
The UK SIC originated in 1948, and has been subject to a number of reviews and upgrades. Data collected by HESA originally used the SIC established in 1992 (SIC92), but now uses the classification agreed in 2007 (SIC2007).
The UK Standard Occupational Classification (SOC) system is used to classify workers by their occupations. Jobs are classified by their skill level and content.