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 Code Description
921110 Executive Offices
921120 Legislative Bodies
921130 Public Finance Activities
921140 Executive and Legislative Offices,Combined
921150 American Indian and Alaska Native Tribal Governments
921190 Other General Government Support
922110 Courts
922120 Police Protection
922130 Legal Counsel and Prosecution
922140 Correctional Institutions
922150 Parole Offices and Probation Offices
922160 Fire Protection
922190 Other Justice,Public Order,and Safety Activities
923110 Administration of Education Programs
923120 Administration of Public Health Programs
923130 Administration of Human Resource Programs (except Education,Public Health,and Veterans Affairs Programs)
923140 Administration of Veterans Affairs
924110 Administration of Air and Water Resource and Solid Waste Management Programs
924120 Administration of Conservation Programs
925110 Administration of Housing Programs
925120 Administration of Urban Planning and Community and Rural Development
926110 Administration of General Economic Programs
926120 Regulation and Administration of Transportation Programs
926130 Regulation and Administration of Communications,Electric,Gas,and Other Utilities
926140 Regulation of Agricultural Marketing and Commodities
926150 Regulation,Licensing,and Inspection of Miscellaneous Commercial Sectors
927110 Space Research and Technology
928110 National Security
928120 International Affairs

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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