SIC Segments 1-9: Agriculture, Forestry, and Fishing
- Agricultural Production – Crops
- Agricultural Production – Livestock
- Agricultural Services
- Fishing, Hunting, and Trapping
- Forestry
SIC Segments 10-14: Mining
- Bituminous Coal and Lignite Mining
- Metal Mining
- Mining and Quarrying of Nonmetallic Minerals
- Oil and Gas Extraction
SIC Segments 15-17: Construction
- Building Construction, General Contractors and Operative Builders
- Construction-Special Trade Contractors
- Heavy Construction other than Building Construction Contractors
SIC Segments 20-39: Manufacturing
- Apparel and Other Finished Products
- Chemicals and Allied Products
- Electronic and Other Electrical Equipment
- Fabricated Metal Products, except Machinery
- Food and Kindred Products
- Furniture and Fixtures
- Industrial and Commercial Machinery
- Leather and Leather Products
- Lumber and Wood Products, except Furniture
- Measuring, Analyzing and Controlling Instruments
- Miscellaneous Manufacturing Industries
- Paper and Allied Products
- Petroleum Refining and Related Industries
- Primary Metal Industries
- Printing, Publishing and Allied Industries
- Rubber and Plastic Products
- Stone, Clay, Glass, and Concrete Products
- Textile Mill Products
- Tobacco Products
SIC Segments 40-49: Transportation and Public Utilities
- Communications
- Electric, Gas, and Sanitary Services
- Local and Suburban Transportation
- Motor Freight Transportation and Warehousing
- Pipelines, except Natural Gas
- Railroad Transportation
- Transportation by Air
- Transportation Equipment
- Transportation Services
- United States Postal Service
- Water Transportation
SIC Segments 50-51: Wholesale Trades
- Wholesale Trade – Durable Goods
- Wholesale Trade – Nondurable Goods
SIC Segments 52-59: Retail Trade
- Apparel and Accessory Stores
- Automotive and Gasoline Service Centers
- Building Materials, Hardware, and Garden Supplies
- Eating and Drinking Establishments
- Food Stores
- General Merchandise Stores
- Home Furniture, Furnishings, and Equipment
- Miscellaneous Retail
SIC Segments 60-67: Finance, Insurance, and Real Estate
- Depository Institutions
- Holding and Other Investment Offices
- Insurance Agents, Brokers, and Services
- Insurance Carriers
- Non-depository Credit Institutions
- Real Estate
- Security and Commodity Brokers and Dealers
SIC Segments 70-89: Professional Services
- Amusement and Recreational Services
- Automotive Repair, Services, and Parking
- Business Services
- Educational Services
- Engineering, Accounting, and Research Institutions
- Health Services
- Hotels, Rooming Houses, and other Residences
- Legal Services
- Membership Organizations
- Miscellaneous Professional Services
- Miscellaneous Repair Services
- Motion Pictures
- Museums, Art Galleries, and Botanical Gardens
- Personal Services
- Private Households
- Social Services
SIC Segments 91-99: Public Administration
- Administration of Economic Programs
- Administration of Environmental Quality
- Administration of Human Resource Programs
- Executive, Legislative, and General Government
- Justice, Public Order, and Safety
- Miscellaneous other Public Administrative Services
- National Security and International Affairs
- Public Finance, Taxation and Monetary Policy