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
482111 Line-Haul Railroads
482112 Short Line Railroads
483111 Deep Sea Freight Transportation
483112 Deep Sea Passenger Transportation
483113 Coastal and Great Lakes Freight Transportation
483114 Coastal and Great Lakes Passenger Transportation
483211 Inland Water Freight Transportation
483212 Inland Water Passenger Transportation
484110 General Freight Trucking,Local
484210 Used Household and Office Goods Moving
484220 Specialized Freight (except Used Goods) Trucking,Local
485210 Interurban and Rural Bus Transportation
485310 Taxi Service
485410 School and Employee Bus Transportation
485510 Charter Bus Industry
485999 All Other Transit and Ground Passenger Transportation
486110 Pipeline Transportation of Crude Oil
486210 Pipeline Transportation of Natural Gas
486910 Pipeline Transportation of Refined Petroleum Products
486990 All Other Pipeline Transportation
487110 Scenic and Sightseeing Transportation,Land
487210 Scenic and Sightseeing Transportation,Water
487990 Scenic and Sightseeing Transportation,Other
488119 Other Airport Operations
488210 Support Activities for Rail Transportation
488330 Navigational Services to Shipping
488390 Other Support Activities for Water Transportation
488410 Motor Vehicle Towing
488490 Other Support Activities for Road Transportation
488510 Freight Transportation Arrangement
488991 Packing and Crating
488999 All Other Support Activities for Transportation
491110 Postal Service
492110 Couriers and Express Delivery Services
492210 Local Messengers and Local Delivery
493110 General Warehousing and Storage
493120 Refrigerated Warehousing and Storage
493130 Farm Product Warehousing and Storage
493190 Other Warehousing and Storage

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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