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What is a SIC Code?

Standard Industrial Classification (SIC) codes are four-digit numerical codes assigned by the U.S. government to business establishments to identify the primary business of the establishment. The classification was developed to facilitate the collection, presentation and analysis of data; and to promote uniformity and comparability in the presentation of statistical data collected by various agencies of the federal government, state agencies and private organizations. The classification covers all economic activities.

The SIC system arrays the economy into 11 divisions, that are divided into 83 2-digit major groups, that are further subdivided into 416 3-digit industry groups, and finally disaggregated into 1,005 4-digit industries.

What is a NAICS Code?

The North American Industry Classification System (NAICS) is used by businesses and governments to classify and measure economic activity in the United States, Canada, and Mexico. NAICS is 6-digit code system that is currently the standard used by federal statistical agencies in classifying establishments (individual business locations).  NAICS organizes establishments into industries according to the similarity in the processes used to produce goods or services.

NAICS codes array the economy into 20 sectors, which are separated into 99 3-digit subsectors, which are divided into 311 4-digit industry groups, which are further subdivided into 709 5-digit industries, and finally disaggregated into 1057 6-digit U.S. industries.