| NAICS code | NAICS Text
| SIC code | SIC Text
|
| 212210 | Iron Ore Mining | 1011 | Iron Ores |
| 212322 | Industrial Sand Mining | 1446 | Industrial Sand |
| 234930 | Industrial Nonbuilding Structure Construction | 1629 | Heavy Construction, NEC (industrial nonbuilding structures construction) |
| 234930 | Industrial Nonbuilding Structure Construction | 8741 | Management Services (industrial nonbuilding structure construction management) |
| 311520 | Ice Cream and Frozen Dessert Manufacturing | 2024 | Ice Cream and Frozen Desserts |
| 312113 | Ice Manufacturing | 2097 | Manufactured Ice |
| 315291 | Infants' Cut and Sew Apparel Manufacturing | 2341 | Women's, Misses', Children's, and Infants' Underwear and Nightwear (infants' except contractors) |
| 315291 | Infants' Cut and Sew Apparel Manufacturing | 2361 | Girls', Children's, and Infants' Dresses, Blouses, and Shirts (infants' except contractors) |
| 315291 | Infants' Cut and Sew Apparel Manufacturing | 2369 | Girls', Children's, and Infants' Outerwear, NEC (infants' except contractors) |
| 315291 | Infants' Cut and Sew Apparel Manufacturing | 2385 | Waterproof Outerwear (infants' outerwear except contractors) |
| 325120 | Industrial Gas Manufacturing | 2813 | Industrial Gases |
| 325120 | Industrial Gas Manufacturing | 2869 | Industrial Organic Chemicals, NEC (fluorocarbon gases) |
| 325131 | Inorganic Dye and Pigment Manufacturing | 2816 | Inorganic Pigments (except bone and lamp black) |
| 325131 | Inorganic Dye and Pigment Manufacturing | 2819 | Industrial Inorganic Chemicals, NEC (inorganic dyes) |
| 325413 | In-Vitro Diagnostic Substance Manufacturing | 2835 | In-Vitro and In-Vivo Diagnostic Substances (in-vitro diagnostic substances) |
| 3311 | Iron and Steel Mills and Ferroalloy Manufacturing | | |
| 331110 | Iron and Steel Mills and Ferroalloy Manufacturing | | |
| 331111 | Iron and Steel Mills | 3312 | Steel Works, Blast Furnaces (Including Coke Ovens), and Rolling Mills (except coke ovens not integrated w |
| 331210 | Iron and Steel Pipe and Tube Manufacturing from Purchased Steel | 3317 | Steel Pipe and Tubes |
| 331511 | Iron Foundries | 3321 | Gray and Ductile Iron Foundries |
| 331511 | Iron Foundries | 3322 | Malleable Iron Foundries |
| 332111 | Iron and Steel Forging | 3462 | Iron and Steel Forgings |
| 332911 | Industrial Valve Manufacturing | 3491 | Industrial Valves |
| 332997 | Industrial Pattern Manufacturing | 3543 | Industrial Patterns |
| 3332 | Industrial Machinery Manufacturing | | |
| 333412 | Industrial and Commercial Fan and Blower Manufacturing | 3564 | Industrial and Commercial Fans and Blowers and Air Purification Equipment (fans and blowers) |
| 333511 | Industrial Mold Manufacturing | 3544 | Special Dies and Tools, Die Sets, Jigs and Fixtures, and Industrial Molds (industrial molds) |
| 333924 | Industrial Truck, Tractor, Trailer, and Stacker Machinery Manufacturing | 3496 | Miscellaneous Fabricated Wire Products (grocery carts) |
| 333924 | Industrial Truck, Tractor, Trailer, and Stacker Machinery 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 | 3799 | Transportation Equipment, NEC (wheelbarrows) |
| 333994 | Industrial Process Furnace and Oven Manufacturing | 3567 | Industrial Process Furnaces and Ovens |
| 334513 | Instruments and Related Products Manufacturing for Measuring, Displaying, and Controlling Industrial Proc | 3823 | Industrial Instruments for Measurement, Display, and Control of Process Variables; and Related Products |
| 334515 | Instrument Manufacturing for Measuring and Testing Electricity and Electrical Signals | 3825 | Instruments for Measuring and Testing of Electricity and Electrical Signals (except automotive ammeters a |
| 334517 | Irradiation Apparatus Manufacturing | 3844 | X-Ray Apparatus and Tubes and Related Irradiation Apparatus |
| 334517 | Irradiation Apparatus Manufacturing | 3845 | Electromedical and Electrotherapeutic Apparatus (CT and CAT Scanners) |
| 337127 | Institutional Furniture Manufacturing | 2531 | Public Building and Related Furniture (furniture made for public buildings) |
| 337127 | Institutional Furniture Manufacturing | 2541 | Wood Office and Store Fixtures, Partitions, Shelving, and Lockers (wood lunchroom tables and chairs) |
| 337127 | Institutional Furniture Manufacturing | 2542 | Office and Store Fixtures, Partitions, Shelving, and Lockers, Except Wood (lunchroom tables and chairs (e |
| 337127 | Institutional Furniture Manufacturing | 2599 | Furniture and Fixtures, NEC (except hospital beds) |
| 337127 | Institutional Furniture Manufacturing | 3952 | Lead Pencils, Crayons, and Artist's Materials (drafting tables and boards) |
| 337127 | Institutional Furniture Manufacturing | 3999 | Manufacturing Industries, NEC (beauty and barber chairs) |
| 421830 | Industrial Machinery and Equipment Wholesalers | 5084 | Industrial Machinery and Equipment |
| 421830 | Industrial Machinery and Equipment Wholesalers | 5085 | Industrial Supplies (fluid power accessories) |
| 421840 | Industrial Supplies Wholesalers | 5085 | Industrial Supplies (except fluid power accessories) |
| 422130 | Industrial and Personal Service Paper Wholesalers | 5113 | Industrial and Personal Service Paper |
| 4832 | Inland Water Transportation | | |
| 483210 | Inland Water Transportation | | |
| 483211 | Inland Water Freight Transportation | 4449 | Water Transportation of Freight, NEC |
| 483212 | Inland Water Passenger Transportation | 4482 | Ferries (inland) |
| 483212 | Inland Water Passenger Transportation | 4489 | Water Transportation of Passengers, NEC (water taxi) |
| 4852 | Interurban and Rural Bus Transportation | | |
| 485210 | Interurban and Rural Bus Transportation | 4131 | Intercity and Rural Bus Transportation |
| 51 | Information | | |
| 512220 | Integrated Record Production/Distribution | 3652 | Phonograph Records and Prerecorded Audio Tapes and Disks (integrated record companies, except duplication |
| 514 | Information Services and Data Processing Services | | |
| 5141 | Information Services | | |
| 522293 | International Trade Financing | 6081 | Branches and Agencies of Foreign Banks (international trade financing) |
| 522293 | International Trade Financing | 6082 | Foreign Trade and International Banking Institutions (international trade financing) |
| 522293 | International Trade Financing | 6111 | Federal and Federally-Sponsored Credit Agencies (trade banks) |
| 522293 | International Trade Financing | 6159 | Miscellaneous Business Credit Institutions (trade banks) |
| 523110 | Investment Banking and Securities Dealing | 6211 | Security Brokers, Dealers, and Flotation Companies (security dealers and underwriters) |
| 523930 | Investment Advice | 6282 | Investment Advice (except portfolio managers) |
| 524 | Insurance Carriers and Related Activities | | |
| 5241 | Insurance Carriers | | |
| 524210 | Insurance Agencies and Brokerages | 6411 | Insurance Agents, Brokers, and Service (insurance agents and brokers) |
| 5251 | Insurance and Employee Benefit Funds | | |
| 541410 | Interior Design Services | 7389 | Business Services, NEC (interior design) |
| 541420 | Industrial Design Services | 7389 | Business Services, NEC (industrial design) |
| 5616 | Investigation and Security Services | | |
| 561610 | Investigation, Guard, and Armored Car Services | | |
| 561611 | Investigation Services | 7381 | Detective, Guard, and Armored Car Services (detective services) |
| 6241 | Individual and Family Services | | |
| 7115 | Independent Artists, Writers, and Performers | | |
| 711510 | Independent Artists, Writers, and Performers | 7819 | Services Allied to Motion Picture Production (film directors and related motion picture production servic |
| 711510 | Independent Artists, Writers, and Performers | 7699 | Repair Shops and Related Services, NEC (taxidermists and antique repair and restoration, except antique c |
| 711510 | Independent Artists, Writers, and Performers | 7929 | Bands, Orchestras, Actors, and Other Entertainers and Entertainment Groups (actors and actresses) |
| 711510 | Independent Artists, Writers, and Performers | 7383 | News Syndicates (independent news correspondents) |
| 711510 | Independent Artists, Writers, and Performers | 7641 | Reupholstery and Furniture Repair (antique furniture restoration) |
| 711510 | Independent Artists, Writers, and Performers | 7922 | Theatrical Producers (Except Motion Picture) and Miscellaneous Theatrical Services (costume design, theat |
| 711510 | Independent Artists, Writers, and Performers | 8999 | Services, NEC (authors, artists, and related technical services, independent) |
| 812332 | Industrial Launderers | 7218 | Industrial Launderers |
| 928120 | International Affairs | 9721 | International Affairs |