United States Classification System

Standard Industrial Classification (SIC) System Search

NAICS Classification (North America Industrial Classification System)

NAICS Association

International Classification Systems

 United Nations Classifications Registry

United Nations Regional/Country Level

Canada (NAICS)

Eurostat's Classifications Server (European Union)

Market Industry Classification Systems

 Standard & Poor's/ Morgan Stanley

GICS

Global Industry Classification Standard (GICS), a collaboration between Standard & Poor's and Morgan Stanley Capital International, is an eight-digit system of classification under that identifies a company according to its business activity. The eight digits can be broken down according to a hierarchy of economic sectors, industry groups, industries and sub-industries.

FTSE/Dow Jones

ICB (International Classification Benchmark)

Dow Jones Indexes and FTSE have created a definitive classification system called the Industry Classification Benchmark (ICB). The system is supported by the ICB Universe Database, which contains over 40,000 companies 45,000 securities worldwide from the FTSE and Dow Jones universes. (www.icbenchmark.com)