Crash Course in Business Research: Industry research

Industry Overview

Classification Codes

Industry classification codes allow you to identify, define and categorize industries.  You can use them in many databases to find information by industry.

  • North American Industry Classification System (NAICS): Adopted in the 1990s by the U.S., Canada, and Mexico to categorize industries. Replaced the SIC system (see below).
  • Standard Industrial Classification (SIC): SIC is a four-digit classification system developed in the 1930's for use by the U.S. federal government.  Although still used in some databases, the SIC classification system is no longer being revised.
  • International Standard Industrial Classification (ISIC):  maintained by the U.N. Statistics Division, the ISIC is used in a number of international databases, such as ILO's LABORSTA.  Rev.4 is the current version. See link on sidebar at this site to other available classifications.