- Television programming and broadcasting activities
- Travel agency, tour operator, reservation service and related activities
- Tanning salons
- Travel agency activities
- Telecommunications
- Technical and vocational secondary education
- Taxis
- Treatment and coating of metals; machining
- Tour operator activities
- Trusts, funds and similar financial entities
- Treatment and disposal of non-hazardous waste
- Thai restaurants
- Tires and batteries
- Tattoo and body piercing
- Travel agency and tour operator activities
- Trucks and trailers
- Trucks and trailer rental
- Transportation and storage
- Towing and roadside assistance
- Transportation logistics