SIC and NAICS Codes
There are many systems used to classify business establishments however, two of the most popular are SIC and NAICS.
- Four-digit Standard Industrial Classification (SIC) codes were first created in 1937.
- As the United States economy changed the seven-digit North American Industrial Classification System (NAICS; pronounced "nakes" which rhymes with "snakes") was established in 1987.
Both systems are still in use today.