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SIC and NAICS Codes

Standard Industrial Classification  North American Industry Classification System

"What is Standard Industrial Classification (SIC)?"

"What is the North American Industrial Classification System (NAICS)?"

NAICS Introduction

Standard Industrial Classification Search
From OSHA.  An excellent searchable SIC database with numbers and definitions.  Use this database first!

Industry Concordances -  Industry Trade Data

NAICS code
Keyword Search

1997 NAICS and 1987 SIC Correspondence Tables 
From U. S. Census Bureau.  An authoritative way to translate between SIC and NAICS code numbers.  Free.

North American Industry Classification System (NAICS) 
From U.S. Census Bureau.  One of the best Web sites in the federal government to monitor for information and news about NAICS.

How NAICS Will Affect Data Users 
From U.S. Census Bureau. An article by Paul T. Zeisset and Mark E. Wallace.   Contains an excellent overview of the issues.

Unofficial clearinghouse concerning NAICS 
From Georgetown University.  Unofficial, but very, very superb!  Overall, it is the most comprehensive NAICS site on the Web. It contains:

Other NAICS links

NAICS Association 
Commercial organization with information and links on NAICS.
This site offers a number of NAICS related CD-ROM products, manuals and downloads for sale.

Industry, Trade, and the Economy: Data and Analysis 
A collection of industry sector data compiled by Export.gov using statistics from the Annual Survey of Manufactures published by the Census Bureau. The data are presented according to the North American Industry Classification System (NAICS), which replaced the Standard Industrial Classification (SIC)system in 1997.

NAICS Information from Statistics Canada 
Statistics Canada, the central statistics gathering body of the Canadian government,  offers information about the Canadian implementation of NAICS along with related Web links.  NAICS manuals for sale.

Other Industrial Classification Systems

Global Trade Analysis Project  
From Purdue University.  The Global Trade Analysis Project is a research organization interested in international trade.  Industrial classification systems help them in their work, and they provide downloadable versions of different code systems in the sites below.

GTAP Concordances 
Contains downloadable industrial classification codes.

"What is Industrial Classification?"



Last Update: November 13, 2015

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