The North American Industry Classification System (NAICS, pronounced Nakes) was developed as the standard for use by Federal statistical agencies in classifying business establishments for the collection, analysis, and publication of statistical data related to the business economy of the U.S. NAICS was developed under the auspices of the Office of Management and Budget (OMB), and adopted in 1997 to replace the old Standard Industrial Classification (SIC) system. It was also developed in cooperation with the statistical agencies of Canada and Mexico to establish a 3-country standard that allows for a high level of comparability in business statistics among the three countries. NAICS is the first economic classification system to be constructed based on a single economic concept.


NAICS Industry Groups
NAICS Code Description
541110 Offices of Lawyers
541120 Offices of Notaries
541191 Title Abstract and Settlement Offices
541199 All Other Legal Services
541211 Offices of Certified Public Accountants
541213 Tax Preparation Services
541214 Payroll Services
541219 Other Accounting Services
541310 Architectural Services
541320 Landscape Architectural Services
541330 Engineering Services
541360 Geophysical Surveying and Mapping Services
541370 Surveying and Mapping (except Geophysical) Services
541380 Testing Laboratories
541430 Graphic Design Services
541511 Custom Computer Programming Services
541512 Computer Systems Design Services
541513 Computer Facilities Management Services
541519 Other Computer Related Services
541612 Human Resources Consulting Services
541614 Process,Physical Distribution,and Logistics Consulting Services
541618 Other Management Consulting Services
541620 Environmental Consulting Services
541690 Other Scientific and Technical Consulting Services
541711 Research and Development in Biotechnology
541712 Reseach and Development in the Physical,Engineering,and Life Sciences (except Biotechnology)
541720 Research and Development in the Social Sciences and Humanities
541810 Advertising Agencies
541820 Public Relations Agencies
541840 Media Representatives
541850 Display Advertising
541860 Direct Mail Advertising
541890 Other Services Related to Advertising
541910 Marketing Research and Public Opinion Polling
541921 Photography Studios,Portrait
541922 Commercial Photography
541930 Translation and Interpretation Services
541940 Veterinary Services
541990 All Other Professional,Scientific,and Technical Services

The SIC covers the entire field of economic activities by defining industries in accordance with the composition and structure of the economy. Over the years, it was revised periodically to reflect the economy's changing industry composition and organization. The Office of Management and Budget (OMB) last updated the SIC in 1987.


SIC Industry Groups

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