| Truck Repairing & Service | 407 |
| Truck Stops | 408 |
| Truck Washing & Cleaning | 408 |
| Trucking Transportation Brokers | 408 |
| Trucking-Dump | 408 |
| Trucking-Heavy Hauling | 408 |
| Trucking-Light Hauling | 408 |
| Trucking-Local Cartage | 408 |
| Trucking-Motor Freight | 408 |
| Trucks-Industrial | 408 |
| Tune-Ups-Automotive | 408 |
| Tutoring | 408 |
| Tuxedos | 409 |
| Typewriters | 409 |
| Typewriters-Renting | 409 |
| Typewriters-Repairing | 409 |
| U |
| Uniforms | 409 |
| Upholsterers | 409 |
| Utility Contractors | 409 |
| V |
| Vacuum Cleaners-Household-Dealers | 409 |
| Vacuum Cleaners-Service & Repair | 409 |
| Vacuum Equipment & Systems | 409 |
| Valves | 409 |
| Variety Stores | 409 |
| Vending Brokers | 410 |
| Vending Machines | 410 |
| Veterans’ & Military Organizations | 410 |
| Veterinarian Emergency Service | 410 |
| Veterinarian Information & Referral Service | 410 |
| Veterinarians-DVM | 411 |
| Veterinarians-DVM-Ophthalmologists | 412 |
| Veterinary Hospitals | 412 |
| Video Games-Dealers | 412 |
| Video Games-Renting & Leasing | 412 |
| Video Production Services | 412 |
| Video Recorders & Players-Whsle & Mfrs | 412 |
| Videotape Duplication & Transfer Service | 412 |
| Videotapes & Discs-Sales & Rentals | 412 |
| Vinyl Tile | 413 |
| Vitamins & Food Supplements | 413 |
| Volunteer Services | 413 |
| W |
| Wallpaper Hangers & Removers | 413 |
| Wallpapers & Wallcoverings | 413 |
| Warehouses-Cold Storage | 413 |
| Warehouses-Commodity & Merchandise | 413 |
| Warehouses-Self Service | 413 |
| Warehouses-Steel & Heavy Machinery | 414 |
| Washing Machines & Dryers | 414 |
| Washing Machines & Dryers-Renting & Leasing | 414 |
| Washing Machines & Dryers-Service & Repair | 414 |