- Telephone Companies Non Wire Line
- Telephone Equipment & Systems Renting
- Teletypewriter Communications Service
- Television Cable & Catv
- Television Cable & Catv Equip & Supls
- Television Stations & Broadcasting Co
- Television Syst Closed Circuit Tlcstng
- Television Transmission Svc
- Terminal & Service Facilities
- Terminals River & Marine
- Tobacco Warehouses
- Toll Bridges
- Tools Stored
- Tourist Information
- Tours Operators & Promoters
- Tours Sound Tape Systems
- Tours Wholesale
- Tow Boat Service
- Towing Marine
- Trade Clearing Exchanges
- Trailer Storage
- Trailers Camping & Travel Storage
- Trailers Transporting
- Trains
- Transfer Companies
- Transit Lines
- Transportation
- Transportation Consultants
- Transportation Lines
- Transportation Services
- Transportation Services Nec
- Transportation Sharing Service
- Travel Agencies & Bureaus
- Travel Consultants
- Travel Escorts
- Trolleys Charter
- Truck Loading & Unloading
- Truck Permit Service
- Truck Scales
- Truck Terminals
- Truck Testing Stations
- Truck Transport Preparation
- Truck Transporting
- Trucking
- Trucking Consultants
- Trucking Containerized Freight
- Trucking Contract Hauling
- Trucking Dump
- Trucking Exempt Commodity
- Trucking Heavy Hauling
- Trucking Liquid & Dry Bulk
- Trucking Local Cartage
- Trucking Management
- Trucking Motor Freight
- Trucking Overdimensional Load
- Trucking Refrigerated
- Trucking Transportation Brokers
- Tv Stations & Broadcasting Co Cnslnts
- Uninterruptible Power Systems
- Utilities
- Utilities Underground Cable Locating Svc
- Utility Management
- Vessel Documentation
- Video Conferencing
- Video Transmission Svc
- Virtual Tours
- Voice Messaging Equipment & Services
- Warehouses
- Warehouses Bonded
- Warehouses Cold Storage
- Warehouses Commodity & Merchandise
- Warehouses Cotton
- Warehouses Merchandise & Self Storage
- Warehouses Mini & Self Storage
- Warehouses Private & Public
- Warehouses Self Storage
- Warehouses Steel & Heavy Machinery
- Warehousing Field
- Waste Containers
- Waste Disposal
- Waste Disposal Hazardous
- Waste Hazardous Transporting
- Waste Materials
- Waste Removal Medical
- Waste Water Disposal
- Waste Water Treatment
- Water & Sewage Companies Utility
- Water Conservation Products & Services
- Water Dealers
- Water Supply Systems
- Water Transportation Of Freight Nec
- Water Transportation Services Nec
- Water Treatment Management Plant
- Weighers
- Whale Watching
- Wine Storage
- Winery Tours
- Yacht Harbors
- Yacht Rigging
