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United States Census

This research guide highlights the electronic and print resources published by the U.S. Census Bureau and select resources that accompany Census research.

Key Economic Indicators

SIC vs NAICS

The North American Industry Classification System has been used since the 2002 Economic Census. If you are comparing pre-NAICS data and need the former SIC code, use the Bridge between NAICS and SIC to find the proper code.

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