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NAICS: North American Industry Classification System
The North American Industry Classification System (NAICS), used by the United States, Mexico, and Canada provides codes and descriptions for businesses and industries.
U.S. Census Bureau: Foreign Trade
Foreign Trade is the official source for U.S. export and import statistics and responsible for issuing regulations governing the reporting of all export shipments from the United States. If you're searching for import or export statistics, information on export regulations, commodity classifications, or a host of other trade related topics, this is the place to get the information you need.
U.S. Customs and Border Protection: Trade
Info on basic importing and exporting, trade programs, security and more
United States Free Trade Agreements
Click on Countries to see facts and figures on US trading partners
US International Trade Commission
The International Trade Commission provides information on tariffs, trade data reports, trade analyses by region and other, and more.