TPA
- Competition and Consumer Act 2010
- Political Union of Economists
- Port of Arica
- TPA Tour
- Taipei Assassins
- Tampa International Airport
- Tanzania Ports Authority
- TaxPayers' Alliance
- Television Programs of America
- Televisión Pública Argentina
- Televisión del Principado de Asturias
- Televisão Pública de Angola
- Tempe Preparatory Academy
- Terapascal
- Terephthalic acid
- Tetradecanoyl phorbol acetate
- Texas Pharmacy Association
- The Pinball Arcade
- Thermal Protective Aid
- Theta Phi Alpha
- Thickened pyrophoric agent
- Third-party access
- Third-party administrator
- Tissue-type plasminogen activator
- Tonne
- Toronto Parking Authority
- Toronto Port Authority
- Trade Practices Act 1974
- Trade Promotion Authority
- Transient program area
- Transpalatal arch
- Travelers Protective Association of America
- Tris(2-pyridylmethyl)amine
- Two-photon absorption