The North American Product Classification System (NAPCS) was created to gather data on products (goods and services) produced by service industries.
The North American Industry Classification System (NAICS) is the hierarchical, numerical system used by the Federal government to classify businesses by industry, in order to collect, analyze, and publish statistical data related to the U.S. business economy. This system was created to accommodate new industries and standardize data with Canada and Mexico. While it replaces the Standard Industrial Classification (SIC) System, some resources still use the old SIC codes.
Use the official NAICS site to identify the NAICS and/or SIC codes for your topic.
- Separate codes exist for manufacturers, retailers, and wholesalers.
- Some resources may include only a company's assigned "primary" industry code. Primary codes apply to the company's main line of business. "Secondary" codes may appear if a company has multiple lines of business.
NAICS and SIC Indexes
North American Industry Classification System (NAICS) byCall Number: A-Level Reference HF 1042.N6 2002aISBN: 0890595666The official NAICS manual will help to understand the hierarchical system and identify codes. Available in print or online through HathiTrust.
Standard Industrial Classification Manual, 1987 byCall Number: A-Level Reference HF1042.S731 1987Decipher the Standard Industrial Classification codes efficiently with this manual. Available in print or online through HathiTrust.
Searching by Industry or Industry Codes
These resources either contain SIC or NAICS indexes, or else organize content or permit searching by industry codes or categories. Some include business or product rankings by industrial code or sector.
Resources vary in the specificity of industry categories and sub-categories. Some include only the broader classification.
To determine the industry code assigned to a company, start with a company directory. For industry ratios, consult the ratio guide.
Once you have your codes, use them to find articles, data, companies or rankings by industry.
Mergent IntellectSearch the various components for industry overviews, job postings, and company profiles, which include Dun and Bradstreet's financial ratios.
Mergent Online by FTSE RussellRetrieve a list of companies by primary and/or secondary industry codes through the home page or Advanced Search screen. Create peer comparison reports by code in company profiles. Primary codes represent the main line of business; secondary codes capture more companies that serve a particular industry.
Data Axle (formerly ReferenceUSA)Use Guided Search to search by geographic criteria and industry codes or yellow page heading in this business directory of U.S. public, private, and nonprofit organizations.
S & P NetadvantageIn-depth company and industry analysis, news, and information on executives, stocks, bonds, and mutual funds from S & P Market Intelligence.
Thomson OneIn-depth company and financial analysis from Refinitiv (formerly Thomson Reuters). Requires a PC and Internet Explorer. Go to the browser settings (gear icon), click on Internet Options, then the Privacy tab to disable pop-up blockers. Click on Settings in your browser, then Compatibility View Settings, and add thomsonone.com to the list of websites. Up to 10 users can access at a time; please log off through the Exit door icon when finished.
Hoover's OnlineFind companies' codes or create lists of companies by NAICS or SIC code through this directory of public and private U.S. and international businesses. Excludes downloading functionality.
Gale Directory LibraryUse Advanced Search to select particular directories from Gale Cengage and search by company, products, or industries or their codes. Among many options, try Ward's Business Directory, Market Share Reporter, and Business Rankings Annual.
ThomasNetOnline version of Thomas Register of Manufacturers helps to match products and their suppliers.