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
Canada Business Lists
Classification Systems Overview
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Additional Industry Codes
Specialized Business Codes
Occupational & Educational Codes
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The NAICS Directory contains a database of all the North American Industry Classification System codes. Use the search box or simply click on any category below.
Executive, Legislative, and Other General Government Support
Justice, Public Order, and Safety Activities
Administration of Human Resource Programs
Administration of Environmental Quality Programs
Administration of Housing Programs, Urban Planning, and Community Development
Administration of Economic Programs
Space Research and Technology
National Security and International Affairs