What are SIC Codes?
SIC Directory / Lookup
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What are NAICS Codes?
NAICS Directory / Lookup
NAICS to SIC Conversion
SIC/NAICS Business Lists - Databases
SIC/NAICS Code Appending
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Classification Systems Overview
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Additional Industry Codes
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The SIC Directory contains a database of all the Standard Industrial Classification codes. Use the search box or simply click on any category below.
Executive, Legislative, and General Government, except Finance
Justice, Public Order, and Safety
Public Finance, Taxation, and Monetary Policy
Administration of Human Resource Programs
Administration of Environmental Quality and Housing Programs
Administration of Economic Programs
National Security and International Affairs