| Transmissions-Automobile | 227 |
| Transmissions-Marine | 227 |
| Transportation Service | 227 |
| Transportation-Personal | 227 |
| Travel Agencies & Bureaus | 227 |
| Tree Service | 227 |
| Trophies | 228 |
| Truck Dealers | 228 |
| Truck Equipment, Parts & Accessories | 228 |
| Truck Painting & Lettering | 229 |
| Truck Renting & Leasing | 229 |
| Truck Repairing & Service | 229 |
| Truck Stops | 229 |
| Trucking Transportation Brokers | 230 |
| Trucking-Dump | 230 |
| Trucking-Heavy Hauling | 230 |
| Trucking-Light Hauling | 230 |
| Trucking-Liquid Or Dry Bulk | 230 |
| Trucking-Local Cartage | 230 |
| Trucking-Motor Freight | 230 |
| Trucks-Industrial | 230 |
| Tune-Ups-Automotive | 230 |
| Tutoring | 230 |
| U |
| Uniforms | 230 |
| Upholsterers | 230 |
| V |
| Vacuum Cleaners-Household-Dealers | 231 |
| Vacuum Cleaners-Industrial & Commercial | 231 |
| Vacuum Cleaners-Service & Repair | 231 |
| Vacuum Cleaning-Industrial | 231 |
| Valves | 231 |
| Valves-Repairing | 231 |
| Vending Machines | 231 |
| Ventilating Contractors | 231 |
| Vessels-Pressure | 231 |
| Veterans’ & Military Organizations | 231 |
| Veterinarian Emergency Service | 232 |
| Veterinarians-DVM | 232 |
| Video Games-Dealers | 233 |
| Video Games-Renting & Leasing | 233 |
| Video Production Services | 233 |
| Videotapes & Discs-Sales & Rentals | 233 |
| W |
| Wallpapers & Wallcoverings | 233 |
| Warehouses-Cold Storage | 233 |
| Warehouses-Commodity & Merchandise | 233 |
| Warehouses-Mini | 233 |
| Waste Reduction, Disposal & Recycling | 233 |
| Equipment-Industrial |
| Watches-Service & Repair | 233 |
| Water Companies-Bottled, Bulk, Etc | 234 |
| Water Companies-Utility | 234 |
| Water Damage Restoration | 234 |
| Water Filters & Purifiers | 234 |
| Water Softening & Conditioning Equipment, | 234 |
| Service & Supplies |
| Water Treatment Equipment, Service & Supplies | 234 |
| Water Treatment, Purification & Filtration | 234 |
| Equipment, Service & Supplies |