| SIC code | SIC Text
| NAICS code | NAICS Text
|
| 0173 | Tree Nuts | 111335 | Tree Nut Farming |
| 0811 | Timber Tracts (short rotation woody crops) | 111421 | Nursery and Tree Production |
| 0132 | Tobacco | 111910 | Tobacco Farming |
| 0253 | Turkey and Turkey Eggs | 112330 | Turkey Production |
| 0811 | Timber Tracts (long term timber farms) | 113110 | Timber Tract Operations |
| 1743 | Terrazzo, Tile, Marble and Mosaic work (fresco work) | 235420 | Drywall, Plastering, Acoustical, and Insulation Contractors |
| 1743 | Terrazzo, Tile, Marble, and Mosaic Work (except fresco work) | 235430 | Tile, Marble, Terrazzo, and Mosaic Contractors |
| 2141 | Tobacco Stemming and Redrying (redrying and stemming) | 312210 | Tobacco Stemming and Redrying |
| 2141 | Tobacco Stemming and Redrying (reconstituted tobacco) | 312229 | Other Tobacco Product Manufacturing |
| 2299 | Textile Goods, NEC (yarn of flax, hemp, jute, and ramie) | 313111 | Yarn Spinning Mills |
| 2284 | Thread Mills (except finishing) | 313113 | Thread Mills |
| 2299 | Textile Goods, NEC (thread of hemp, linen, and ramie) | 313113 | Thread Mills |
| 2299 | Textile Goods, NEC (broadwoven fabrics of jute, linen, hemp, and ramie and handwoven) | 313210 | Broadwoven Fabric Mills |
| 2299 | Textile Goods, NEC (narrow woven fabric of jute, linen, hemp, and ramie) | 313221 | Narrow Fabric Mills |
| 2299 | Textile Goods, NEC (nonwoven felt) | 313230 | Nonwoven Fabric Mills |
| 2284 | Thread Mills (thread finishing) | 313312 | Textile and Fabric Finishing (except Broadwoven Fabric) Mills |
| 2299 | Textile Goods, NEC (finishing hard fiber thread and yarn) | 313312 | Textile and Fabric Finishing (except Broadwoven Fabric) Mills |
| 2393 | Textile Bags | 314911 | Textile Bag Mills |
| 2296 | Tire Cord and Fabrics | 314992 | Tire Cord and Tire Fabric Mills |
| 2299 | Textile Goods, NEC (recovery and processing of fibers and waste) | 314999 | All Other Miscellaneous Textile Product Mills |
| 2791 | Typesetting | 323122 | Prepress Services |
| 2844 | Toilet Preparations (toothpaste) | 325611 | Soap and Other Detergent Manufacturing |
| 3011 | Tires and Inner Tubes | 326211 | Tire Manufacturing (except Retreading) |
| 7534 | Tire Retreading and Repair Shops (rebuilding) | 326212 | Tire Retreading |
| 3552 | Textile Machinery | 333292 | Textile Machinery Manufacturing |
| 3799 | Transportation Equipment, NEC (wheelbarrows) | 333924 | Industrial Truck, Tractor, Trailer, and Stacker Machinery Manufacturing |
| 3661 | Telephone and Telegraph Apparatus (except consumer external modems) | 334210 | Telephone Apparatus Manufacturing |
| 3661 | Telephone and Telegraph Apparatus (consumer external modems) | 334418 | Printed Circuit Assembly (Electronic Assembly) Manufacturing |
| 3824 | Totalizing Fluid Meters and Counting Devices | 334514 | Totalizing Fluid Meter and Counting Device Manufacturing |
| 3713 | Truck and Bus Bodies | 336211 | Motor Vehicle Body Manufacturing |
| 3715 | Truck Trailers | 336212 | Truck Trailer Manufacturing |
| 3792 | Travel Trailers and Campers | 336214 | Travel Trailer and Camper Manufacturing |
| 3799 | Transportation Equipment, NEC (automobile, boat, utility and light truck trailers) | 336214 | Travel Trailer and Camper Manufacturing |
| 3799 | Transportation Equipment, NEC (trailer hitches) | 336399 | All Other Motor Vehicle Parts Manufacturing |
| 3795 | Tanks and Tank Components | 336992 | Military Armored Vehicle, Tank, and Tank Component Manufacturing |
| 3799 | Transportation Equipment, NEC (except automobile, boat, utility light truck trailers, trailer hitches, an | 336999 | All Other Transportation Equipment Manufacturing |
| 5014 | Tires and Tubes (except tires sold via retail method) | 421130 | Tire and Tube Wholesalers |
| 5088 | Transportation Equipment and Supplies, Except Motor Vehicles | 421860 | Transportation Equipment and Supplies (except Motor Vehicle) Wholesalers |
| 5092 | Toys and Hobby Goods and Supplies | 421920 | Toy and Hobby Goods and Supplies Wholesalers |
| 5194 | Tobacco and Tobacco Products | 422940 | Tobacco and Tobacco Product Wholesalers |
| 5014 | Tires and Tubes (Wholesale) (tires and tubes sold via retail method) | 441320 | Tire Dealers |
| 5993 | Tobacco Stores and Stands | 453991 | Tobacco Stores |
| 4213 | Trucking, Except Local (general freight, truckload) | 484121 | General Freight Trucking, Long-Distance, Truckload |
| 4213 | Trucking, Except Local (general freight, less than truckload) | 484122 | General Freight Trucking, Long-Distance, Less Than Truckload |
| 4213 | Trucking, Except Local (household goods moving) | 484210 | Used Household and Office Goods Moving |
| 4213 | Trucking, Except Local (specialized freight) | 484230 | Specialized Freight (except Used Goods) Trucking, Long-Distance |
| 4121 | Taxicabs | 485310 | Taxi Service |
| 4789 | Transportation Services, NEC (horse-drawn cabs and carriages) | 487110 | Scenic and Sightseeing Transportation, Land |
| 4789 | Transportation Services, NEC (car loading and unloading; cleaning of railroad ballasts; dining, parlor, s | 488210 | Support Activities for Rail Transportation |
| 4492 | Towing and Tugboat Services | 488330 | Navigational Services to Shipping |
| 4173 | Terminal and Service Facilities for Motor Vehicle Passenger Transportation | 488490 | Other Support Activities for Road Transportation |
| 4231 | Terminal and Joint Terminal Maintenance Facilities for Motor Freight Transportation | 488490 | Other Support Activities for Road Transportation |
| 4789 | Transportation Services, NEC (pipeline terminals and stockyards for transportation) | 488999 | All Other Support Activities for Transportation |
| 7922 | Theatrical Producers (Except Motion Picture) and Miscellaneous Theatrical Services (producers of radio pr | 512290 | Other Sound Recording Industries |
| 4833 | Television Broadcasting Stations | 513120 | Television Broadcasting |
| 4813 | Telephone Communications, Except Radiotelephone (except resellers) | 513310 | Wired Telecommunications Carriers |
| 4822 | Telegraph and Other Message Communications | 513310 | Wired Telecommunications Carriers |
| 4813 | Telephone Communications, Except Radiotelephone (wired resellers) | 513330 | Telecommunications Resellers |
| 4813 | Telephone Communications, Except Radiotelephone (satellite resellers) | 513340 | Satellite Telecommunications |
| 6733 | Trust, Except Educational, Religious, and Charitable (managers) | 523920 | Portfolio Management |
| 6733 | Trusts, Except Educational, Religious, and Charitable (administrators of private estates) | 523991 | Trust, Fiduciary, and Custody Activities |
| 6361 | Title Insurance (title insurers-direct) | 524127 | Direct Title Insurance Carriers |
| 6361 | Title Insurance (reinsurers) | 524130 | Reinsurance Carriers |
| 6733 | Trusts, Except Educational, Religious, and Charitable (vacation funds for employees) | 525190 | Other Insurance Funds |
| 6733 | Trusts, Except Educational, Religious, and Charitable (personal trusts, estates, and agency accounts) | 525920 | Trusts, Estates, and Agency Accounts |
| 7513 | Truck Rental and Leasing Without Drivers | 532120 | Truck, Utility Trailer, and RV (Recreational Vehicle) Rental and Leasing |
| 7922 | Theatrical Producers (Except Motion Picture) and Miscellaneous Theatrical Services (theatrical equipment | 532490 | Other Commercial and Industrial Machinery and Equipment Rental and Leasing |
| 6541 | Title Abstract Offices | 541191 | Title Abstract and Settlement Offices |
| 7291 | Tax Return Preparation Services | 541213 | Tax Preparation Services |
| 8734 | Testing Laboratories (except veterinary testing laboratories) | 541380 | Testing Laboratories |
| 8734 | Testing Laboratories (veterinary testing laboratories) | 541940 | Veterinary Services |
| These establishments were included as auxiliaries in the 1987 Standard Industrial Classification | 551114 | Corporate, Subsidiary, and Regional Managing Offices |
| 7922 | Theatrical Producers and Miscellaneous Theatrical Services (casting agencies) | 561310 | Employment Placement Agencies |
| 4724 | Travel Agencies | 561510 | Travel Agencies |
| 4725 | Tour Operators | 561520 | Tour Operators |
| 7922 | Theatrical Producers (except motion pictures) and Miscellaneous Theatrical Services (theatrical ticket ag | 561599 | All Other Travel Arrangement and Reservation Services |
| 7922 | Theatrical Producers (Except Motion Pictures) and Miscellaneous Theatrical Services (theater companies, o | 711110 | Theater Companies and Dinner Theaters |
| 7922 | Theatrical Producers (Except Motion Pictures) and Miscellaneous Theatrical Services (ballet and dance com | 711120 | Dance Companies |
| 7922 | Theatrical Producers (Except Motion Picture) and Miscellaneous Theatrical Services (theater operators) | 711310 | Promoters of Performing Arts, Sports, and Similar Events with Facilities |
| 7922 | Theatrical Producers (Except Motion Picture) and Miscellaneous Theatrical Services (theatrical promoters) | 711320 | Promoters of Performing Arts, Sports, and Similar Events without Facilities |
| 7922 | Theatrical Producers (Except Motion Picture) and Miscellaneous Theatrical Services (theatrical agents) | 711410 | Agents and Managers for Artists, Athletes, Entertainers, and Other Public Figures |
| 7922 | Theatrical Producers (Except Motion Picture) and Miscellaneous Theatrical Services (costume design, theat | 711510 | Independent Artists, Writers, and Performers |
| 4789 | Transportation Services, NEC (dining car operations on a fee or contract basis) | 722310 | Food Service Contractors |
| 7532 | Top, Body, and Upholstery Repair Shops and Paint Shops | 811121 | Automotive Body, Paint, and Interior Repair and Maintenance |
| 7534 | Tire Retreading and Repair Shops (repair) | 811198 | All Other Automotive Repair and Maintenance |
