NAICS (North American Industry Classification System) and SIC (Standard Industry Classification) codes are an easy way to group companies engaged in the same economic activities, like mining, retail, or health care.
SIC was used by the US and Canadian governments until 1987, when both countries adopted NAICS. Some commercial databases continue to use SIC, however.
Find more information on SIC and NAICS codes at the following sites.
You can search by NAICS and/or SIC in the following databases.
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