- Major Group 01: Agricultural Production Crops
- Major Group 02: Agriculture production livestock and animal specialties
- Major Group 07: Agricultural Services
- Major Group 08: Forestry
- Major Group 09: Fishing, hunting, and trapping
- Major Group 10: Metal Mining
- Major Group 12: Coal Mining
- Major Group 13: Oil And Gas Extraction
- Major Group 14: Mining And Quarrying Of Nonmetallic Minerals, Except Fuels
- Major Group 15: Building Construction General Contractors And Operative Builders
- Major Group 16: Heavy Construction Other Than Building Construction Contractors
- Major Group 17: Construction Special Trade Contractors
- Major Group 20: Food And Kindred Products
- Major Group 21: Tobacco Products
- Major Group 22: Textile Mill Products
- Major Group 23: Apparel And Other Finished Products Made From Fabrics And Similar Materials
- Major Group 24: Lumber And Wood Products, Except Furniture
- Major Group 25: Furniture And Fixtures
- Major Group 26: Paper And Allied Products
- Major Group 27: Printing, Publishing, And Allied Industries
- Major Group 28: Chemicals And Allied Products
- Major Group 29: Petroleum Refining And Related Industries
- Major Group 30: Rubber And Miscellaneous Plastics Products
- Major Group 31: Leather And Leather Products
- Major Group 32: Stone, Clay, Glass, And Concrete Products
- Major Group 33: Primary Metal Industries
- Major Group 34: Fabricated Metal Products, Except Machinery And Transportation Equipment
- Major Group 35: Industrial And Commercial Machinery And Computer Equipment
- Major Group 36: Electronic And Other Electrical Equipment And Components, Except Computer Equipment
- Major Group 37: Transportation Equipment
- Major Group 38: Measuring, Analyzing, And Controlling Instruments; Photographic, Medical And Optical Goods; Watches And Clocks
- Major Group 39: Miscellaneous Manufacturing Industries
- Major Group 40: Railroad Transportation
- Major Group 41: Local And Suburban Transit And Interurban Highway Passenger Transportation
- Major Group 42: Motor Freight Transportation And Warehousing
- Major Group 43: United States Postal Service
- Major Group 44: Water Transportation
- Major Group 45: Transportation By Air
- Major Group 46: Pipelines, Except Natural Gas
- Major Group 47: Transportation Services
- Major Group 48: Communications
- Major Group 49: Electric, Gas, And Sanitary Services
- Major Group 52: Building Materials, Hardware, Garden Supply, And Mobile Home Dealers
- Major Group 53: General Merchandise Stores
- Major Group 54: Food Stores
- Major Group 55: Automotive Dealers And Gasoline Service Stations
- Major Group 56: Apparel And Accessory Stores
- Major Group 57: Home Furniture, Furnishings, And Equipment Stores
- Major Group 58: Eating And Drinking Places
- Major Group 59: Miscellaneous Retail
- Major Group 60: Depository Institutions
- Major Group 61: Non-depository Credit Institutions
- Major Group 62: Security And Commodity Brokers, Dealers, Exchanges, And Services
- Major Group 63: Insurance Carriers
- Major Group 64: Insurance Agents, Brokers, And Service
- Major Group 65: Real Estate
- Major Group 67: Holding And Other Investment Offices
- Major Group 70: Hotels, Rooming Houses, Camps, And Other Lodging Places
- Major Group 72: Personal Services
- Major Group 73: Business Services
- Major Group 75: Automotive Repair, Services, And Parking
- Major Group 76: Miscellaneous Repair Services
- Major Group 78: Motion Pictures
- Major Group 79: Amusement And Recreation Services
- Major Group 80: Health Services
- Major Group 81: Legal Services
- Major Group 82: Educational Services
- Major Group 83: Social Services
- Major Group 84: Museums, Art Galleries, And Botanical And Zoological Gardens
- Major Group 86: Membership Organizations
- Major Group 87: Engineering, Accounting, Research, Management, And Related Services
- Major Group 88: Private Households
- Major Group 89: Miscellaneous Services
- Major Group 91: Executive, Legislative, And General Government, Except Finance
- Major Group 92: Justice, Public Order, And Safety
- Major Group 93: Public Finance, Taxation, And Monetary Policy
- Major Group 94: Administration Of Human Resource Programs
- Major Group 95: Administration Of Environmental Quality And Housing Programs
- Major Group 96: Administration Of Economic Programs
- Major Group 97: National Security And International Affairs
- Major Group 99: Nonclassifiable Establishments
A. Division A: Agriculture, Forestry, And Fishing
B. Division B: Mining
C. Division C: Construction
D. Division D: Manufacturing
E. Division E: Transportation, Communications, Electric, Gas, And Sanitary Services
F. Division F: Wholesale Trade
G. Division G: Retail Trade
H. Division H: Finance, Insurance, And Real Estate
I. Division I: Services
J. Division J: Public Administration