The DiMenna-Nyselius Library is open for current Fairfield University students, faculty, and staff only. To learn more about our resources and services, visit the link below
The importance of SIC and NAICS Codes
Many of the resources listed here use SIC (Standard Industrial Classifications) codes or NAICS (North American Industry Classification System) codes to classify information. Searching by these codes can be very effective.
Every industry is assigned a four-digit SIC code, so all companies in the same industry will have the same code. A company may have more than one SIC code if they are in different segments of industry, but usually only one or two are considered the primary SIC codes.
The NAICS system of six-digit numbers is replacing the SIC system. Many of our business databases, such as Business & Company Resource Center, will list the codes for a particular company or industry.