- Agriculture, Forestry & Fishing
- Agricultural Production Crops (34)
- Agriculture production livestock and animal specialties (63)
- Agricultural Services (85)
- Forestry (6)
- Fishing, hunting, and trapping (1)
- Construction & Mining
- Metal Mining (8)
- Coal Mining (4)
- Oil And Gas Extraction (231)
- Mining And Quarrying Of Nonmetallic Minerals, Except Fuels (8)
- Building Construction General Contractors And Operative Builders (190)
- Heavy Construction Other Than Building Construction Contractors (46)
- Construction Special Trade Contractors (375)
- Manufacturing
- Food And Kindred Products (10)
- Apparel And Other Finished Products Made From Fabrics And Similar Materials (14)
- Lumber And Wood Products, Except Furniture (24)
- Furniture And Fixtures (1)
- Printing, Publishing, And Allied Industries (39)
- Chemicals And Allied Products (10)
- Petroleum Refining And Related Industries (8)
- Rubber And Miscellaneous Plastics Products (4)
- Leather And Leather Products (4)
- Stone, Clay, Glass, And Concrete Products (15)
- Primary Metal Industries (2)
- Fabricated Metal Products, Except Machinery And Transportation Equipment (33)
- Industrial And Commercial Machinery And Computer Equipment (75)
- Electronic And Other Electrical Equipment And Components, Except Computer Equipment (15)
- Manufacturing (con't)
- Transportation Equipment (9)
- Measuring, Analyzing, And Controlling Instruments; Photographic, Medical And Optical Goods; Watches And Clocks (12)
- Miscellaneous Manufacturing Industries (37)
- Transportation & Utilities
- Local And Suburban Transit And Interurban Highway Passenger Transportation (7)
- Motor Freight Transportation And Warehousing (138)
- United States Postal Service (1)
- Water Transportation (4)
- Transportation By Air (10)
- Pipelines, Except Natural Gas (11)
- Transportation Services (28)
- Communications (59)
- Electric, Gas, And Sanitary Services (27)
- Retail & Wholesale Trade
- Wholesale Trade-durable Goods (319)
- Wholesale Trade-non-durable Goods (106)
- Building Materials, Hardware, Garden Supply, And Mobile Home Dealers (58)
- General Merchandise Stores (21)
- Food Stores (85)
- Automotive Dealers And Gasoline Service Stations (130)
- Apparel And Accessory Stores (69)
- Home Furniture, Furnishings, And Equipment Stores (104)
- Eating And Drinking Places (187)
- Miscellaneous Retail (329)
- Finance, Insurance & Real Estate (con't)
- Insurance Agents, Brokers, And Service (97)
- Real Estate (275)
- Holding And Other Investment Offices (101)
- Services
- Hotels, Rooming Houses, Camps, And Other Lodging Places (56)
- Personal Services (183)
- Business Services (1493)
- Automotive Repair, Services, And Parking (168)
- Miscellaneous Repair Services (165)
- Motion Pictures (24)
- Amusement And Recreation Services (101)
- Health Services (294)
- Legal Services (114)
- Educational Services (89)
- Social Services (180)
- Museums, Art Galleries, And Botanical And Zoological Gardens (13)
- Membership Organizations (220)
- Engineering, Accounting, Research, Management, And Related Services (339)
- Miscellaneous Services (113)
- Public Administration
- Executive, Legislative, And General Government, Except Finance (21)
- Justice, Public Order, And Safety (25)
- Public Finance, Taxation, And Monetary Policy (4)
- Administration Of Human Resource Programs (16)
- Administration Of Environmental Quality And Housing Programs (24)
- Administration Of Economic Programs (15)
- National Security And International Affairs (8)
- Nonclassifiable Establishments (635)