| SIC code | SIC Text
| NAICS code | NAICS Text
|
| 0134 | Irish Potatoes | 111211 | Potato Farming |
| 2819 | Industrial Inorganic Chemicals, NEC (recovering sulfur from natural gas) | 211112 | Natural Gas Liquid Extraction |
| 1011 | Iron Ores | 212210 | Iron Ore Mining |
| 1446 | Industrial Sand | 212322 | Industrial Sand Mining |
| 4971 | Irrigation Systems | 221310 | Water Supply and Irrigation Systems |
| 1796 | Installation or Erection of Building Equipment, NEC | 235950 | Building Equipment and Other Machinery Installation Contractors |
| 2024 | Ice Cream and Frozen Desserts | 311520 | Ice Cream and Frozen Dessert Manufacturing |
| 2869 | Industrial Organic Chemicals, NEC (aliphatics) | 325110 | Petrochemical Manufacturing |
| 2813 | Industrial Gases | 325120 | Industrial Gas Manufacturing |
| 2869 | Industrial Organic Chemicals, NEC (fluorocarbon gases) | 325120 | Industrial Gas Manufacturing |
| 2816 | Inorganic Pigments (except bone and lamp black) | 325131 | Inorganic Dye and Pigment Manufacturing |
| 2819 | Industrial Inorganic Chemicals, NEC (inorganic dyes) | 325131 | Inorganic Dye and Pigment Manufacturing |
| 2816 | Inorganic pigments (bone and lamp black) | 325182 | Carbon Black Manufacturing |
| 2819 | Industrial Inorganic Chemicals, NEC (except activated carbon and charcoal, alumina, and inorganic industr | 325188 | All Other Basic Inorganic Chemical Manufacturing |
| 2869 | Industrial Organic Chemicals, NEC (carbon bisulfide) | 325188 | All Other Basic Inorganic Chemical Manufacturing |
| 2869 | Industrial Organic Chemicals (ethyl alcohol) | 325193 | Ethyl Alcohol Manufacturing |
| 2869 | Industrial Organic Chemicals, NEC (except aliphatics, carbon bisulfide, ethyl alcohol, and fluorocarbon g | 325199 | All Other Basic Organic Chemical Manufacturing |
| 2835 | In-Vitro and In-Vivo Diagnostic Substances (except in-vitro diagnostic) | 325412 | Pharmaceutical Preparation Manufacturing |
| 2835 | In-Vitro and In-Vivo Diagnostic Substances (in-vitro diagnostic substances) | 325413 | In-Vitro Diagnostic Substance Manufacturing |
| 2819 | Industrial Inorganic Chemicals, NEC (activated carbon and charcoal) | 325998 | All Other Miscellaneous Chemical Product and Preparation Manufacturing |
| 2819 | Industrial Inorganic Chemicals, NEC (alumina) | 331311 | Alumina Refining |
| 3462 | Iron and Steel Forgings | 332111 | Iron and Steel Forging |
| 3537 | Industrial Trucks, Tractors, Trailers, and Stackers (metal air cargo containers) | 332439 | Other Metal Container Manufacturing |
| 3599 | Industrial and Commercial Machinery and Equipment, NEC (machine shops) | 332710 | Machine Shops |
| 3491 | Industrial Valves | 332911 | Industrial Valve Manufacturing |
| 3543 | Industrial Patterns | 332997 | Industrial Pattern Manufacturing |
| 3537 | Industrial Trucks, Tractors, Trailers, and Stackers (metal pallets) | 332999 | All Other Miscellaneous Fabricated Metal Product Manufacturing |
| 3599 | Industrial and Commercial Machinery and Equipment, NEC (flexible metal hose) | 332999 | All Other Miscellaneous Fabricated Metal Product Manufacturing |
| 3559 | Industrial and Commercial Machinery and Equipment, NEC (cotton ginning machinery) | 333111 | Farm Machinery and Equipment Manufacturing |
| 3599 | Industrial and Commercial Machinery and Equipment, NEC (carnival amusement park equipment) | 333319 | Other Commercial and Service Industry Machinery Manufacturing |
| 3564 | Industrial and Commercial Fans and Blowers and Air Purification Equipment (air purification equipment) | 333411 | Air Purification Equipment Manufacturing |
| 3564 | Industrial and Commercial Fans and Blowers and Air Purification Equipment (fans and blowers) | 333412 | Industrial and Commercial Fan and Blower Manufacturing |
| 3519 | Internal Combustion Engines, NEC (except stationary engine radiators) | 333618 | Other Engine Equipment Manufacturing |
| 3537 | Industrial Trucks, Tractors, Trailers, and Stackers (except metal pallets and metal air cargo containers) | 333924 | Industrial Truck, Tractor, Trailer, and Stacker Machinery Manufacturing |
| 3567 | Industrial Process Furnaces and Ovens | 333994 | Industrial Process Furnace and Oven Manufacturing |
| 3599 | Industrial and Commercial Machinery and Equipment, NEC (other industrial and commercial machinery and equ | 333999 | All Other Miscellaneous General Purpose Machinery Manufacturing |
| 3823 | Industrial Instruments for Measurement, Display, and Control of Process Variables; and Related Products | 334513 | Instruments and Related Products Manufacturing for Measuring, Displaying, and Controlling Industrial Proc |
| 3825 | Instruments for Measuring and Testing of Electricity and Electrical Signals (automotive ammeters and volt | 334514 | Totalizing Fluid Meter and Counting Device Manufacturing |
| 3825 | Instruments for Measuring and Testing of Electricity and Electrical Signals (except automotive ammeters a | 334515 | Instrument Manufacturing for Measuring and Testing Electricity and Electrical Signals |
| 3519 | Internal Combustion Engines, NEC (stationary engine radiators) | 336399 | All Other Motor Vehicle Parts Manufacturing |
| 3599 | Industrial and Commercial Machinery and Equipment, NEC (gasoline, oil, and intake filters for internal co | 336399 | All Other Motor Vehicle Parts Manufacturing |
| 5084 | Industrial Machinery and Equipment | 421830 | Industrial Machinery and Equipment Wholesalers |
| 5085 | Industrial Supplies (fluid power accessories) | 421830 | Industrial Machinery and Equipment Wholesalers |
| 5085 | Industrial Supplies (except fluid power accessories) | 421840 | Industrial Supplies Wholesalers |
| 5113 | Industrial and Personal Service Paper | 422130 | Industrial and Personal Service Paper Wholesalers |
| 4131 | Intercity and Rural Bus Transportation | 485210 | Interurban and Rural Bus Transportation |
| 7375 | Information Retrieval Services | 514191 | On-Line Information Services |
| 6799 | Investors, NEC (commodity contract trading companies) | 523130 | Commodity Contracts Dealing |
| 6799 | Investors, NEC (venture capital companies, investment clubs, and speculators for own account) | 523910 | Miscellaneous Intermediation |
| 6282 | Investment Advice (portfolio managers) | 523920 | Portfolio Management |
| 6799 | Investors, NEC (commodity contract pool operators) | 523920 | Portfolio Management |
| 6282 | Investment Advice (except portfolio managers) | 523930 | Investment Advice |
| 6399 | Insurance Carriers, NEC | 524128 | Other Direct Insurance (except Life, Health, and Medical) Carriers |
| 6411 | Insurance Agents, Brokers, and Service (insurance agents and brokers) | 524210 | Insurance Agencies and Brokerages |
| 6411 | Insurance Agents, Brokers, and Service (insurance claims adjusters) | 524291 | Claims Adjusting |
| 6411 | Insurance Agents, Brokers, and Service (processors) | 524292 | Third Party Administration of Insurance and Pension Funds |
| 6411 | Insurance Agents, Brokers, and Service (except processors, agents and brokers, and claims adjusters) | 524298 | All Other Insurance Related Activities |
| 8052 | Intermediate Care Facilities (except continuing care retirement communities and mental retardation facili | 623110 | Nursing Care Facilities |
| 8052 | Intermediate Care Facilities (mental retardation facilities) | 623210 | Residential Mental Retardation Facilities |
| 8052 | Intermediate Care Facilities (continuing care retirement communities) | 623311 | Continuing Care Retirement Communities |
| 8322 | Individual and Family Social Services (child and youth services) | 624110 | Child and Youth Services |
| 8322 | Individual and Family Social Services (services for the elderly and disabled) | 624120 | Services for the Elderly and Persons with Disabilities |
| 8322 | Individual and Family Social Services (except services for children, youth, elderly, disabled; food, hous | 624190 | Other Individual and Family Services |
| 8322 | Individual and Family Social Services (food services) | 624210 | Community Food Services |
| 8322 | Individual and Family Social Services (temporary shelter) | 624221 | Temporary Shelters |
| 8322 | Individual and Family Social Services (housing services except temporary shelter) | 624229 | Other Community Housing Services |
| 8322 | Individual and Family Social Services (emergency and relief services) | 624230 | Emergency and Other Relief Services |
| 7218 | Industrial Launderers | 812332 | Industrial Launderers |
| 8322 | Individual and Family Social Services (parole and probation offices) | 922150 | Parole Offices and Probation Offices |
| 9721 | International Affairs | 928120 | International Affairs |
