- Agriculture, Forestry & Fishing
- Agricultural Production Crops (49)
- Agriculture production livestock and animal specialties (58)
- Agricultural Services (125)
- Forestry (10)
- Fishing, hunting, and trapping (62)
- Construction & Mining
- Metal Mining (21)
- Coal Mining (1)
- Oil And Gas Extraction (55)
- Mining And Quarrying Of Nonmetallic Minerals, Except Fuels (27)
- Building Construction General Contractors And Operative Builders (324)
- Heavy Construction Other Than Building Construction Contractors (173)
- Construction Special Trade Contractors (694)
- Manufacturing
- Food And Kindred Products (176)
- Textile Mill Products (16)
- Apparel And Other Finished Products Made From Fabrics And Similar Materials (30)
- Lumber And Wood Products, Except Furniture (125)
- Furniture And Fixtures (28)
- Paper And Allied Products (20)
- Printing, Publishing, And Allied Industries (99)
- Chemicals And Allied Products (28)
- Petroleum Refining And Related Industries (10)
- Rubber And Miscellaneous Plastics Products (13)
- Leather And Leather Products (2)
- Stone, Clay, Glass, And Concrete Products (50)
- Primary Metal Industries (9)
- Fabricated Metal Products, Except Machinery And Transportation Equipment (50)
- Industrial And Commercial Machinery And Computer Equipment (54)
- Manufacturing (con't)
- Electronic And Other Electrical Equipment And Components, Except Computer Equipment (29)
- Transportation Equipment (38)
- Measuring, Analyzing, And Controlling Instruments; Photographic, Medical And Optical Goods; Watches And Clocks (18)
- Miscellaneous Manufacturing Industries (58)
- Transportation & Utilities
- Local And Suburban Transit And Interurban Highway Passenger Transportation (148)
- Motor Freight Transportation And Warehousing (316)
- United States Postal Service (308)
- Water Transportation (72)
- Transportation By Air (66)
- Transportation Services (136)
- Communications (124)
- Electric, Gas, And Sanitary Services (100)
- Retail & Wholesale Trade
- Wholesale Trade-durable Goods (621)
- Wholesale Trade-non-durable Goods (404)
- Building Materials, Hardware, Garden Supply, And Mobile Home Dealers (375)
- General Merchandise Stores (301)
- Food Stores (870)
- Automotive Dealers And Gasoline Service Stations (708)
- Apparel And Accessory Stores (234)
- Home Furniture, Furnishings, And Equipment Stores (341)
- Eating And Drinking Places (989)
- Miscellaneous Retail (1137)
- Finance, Insurance & Real Estate (con't)
- Real Estate (356)
- Holding And Other Investment Offices (242)
- Services
- Hotels, Rooming Houses, Camps, And Other Lodging Places (429)
- Personal Services (710)
- Business Services (1141)
- Automotive Repair, Services, And Parking (548)
- Miscellaneous Repair Services (374)
- Motion Pictures (128)
- Amusement And Recreation Services (503)
- Health Services (670)
- Legal Services (159)
- Educational Services (499)
- Social Services (528)
- Museums, Art Galleries, And Botanical And Zoological Gardens (54)
- Membership Organizations (736)
- Engineering, Accounting, Research, Management, And Related Services (702)
- Miscellaneous Services (58)
- Public Administration
- Executive, Legislative, And General Government, Except Finance (510)
- Justice, Public Order, And Safety (111)
- Public Finance, Taxation, And Monetary Policy (21)
- Administration Of Human Resource Programs (97)
- Administration Of Environmental Quality And Housing Programs (66)
- Administration Of Economic Programs (128)
- National Security And International Affairs (41)
- Nonclassifiable Establishments (2)