The later NAICS classification system has a different concept, assigning establishments into categories based on each one's output. headquarters, was determined by the industry appropriate for the overall largest product lines of the company or organization of which the establishment was a part. The SIC code for an establishment, that is, a unique business with a registered U.S. Securities and Exchange Commission (SEC), continued to use SIC codes through at least 2019. government departments and agencies, such as the U.S. In the United States, the SIC system was last revised in 1987 and was last used by the Census Bureau for the 1992 Economic Census, and has been replaced by the North American Industry Classification System (NAICS code), which was released in 1997.
Similar SIC systems are also used by agencies in other countries, e.g., by the United Kingdom's Companies House. Established in the United States in 1937, it is used by government agencies to classify industry areas.
The Standard Industrial Classification (SIC) was a system for classifying industries by a four-digit code as a method of standardizing industry classification for statistical purposes across agencies. For the United Kingdom Standard Industrial Classification code system, see United Kingdom Standard Industrial Classification of Economic Activities
This article refers to the Industrial classification code system for the United States.
