Industrial Classification
- Commodity Translation Wizard - ITC DataWeb - HTS and SIC, SITC, NAICS
- 1997 NAICS & 1987 SIC Correspondence Tables - U.S. Census Bureau
- Harmonized Tariff Schedule of the United States - U.S. International Trade Commmission
- NACE Classification of Economic Activities in the European Community and ISIC -- International Standard Industrial Classification of all Economic Activities
- Industry Concordances - Jon D. Haveman
- NAICS - North American Industry Classification System
- SIC Manual - Standard Industrial Classification Search
- Universal Standard Products & Services Classification
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