TPO
- Parietal-temporal-occipital
- Taipei Philharmonic Orchestra
- Thailand Philharmonic Orchestra
- The People's Operator
- Thermoplastic olefin
- Third-party ownership in association football
- Thrombopoietin
- Thyroid peroxidase
- Tin Pot Operation
- Tokyo Philharmonic Orchestra
- Transmitter power output
- Transportation Planning
- Travelling Post Office
- Travelling Post Office, Queensland
- Triple peel on opponent
- Turku Philharmonic Orchestra
- Victoria Transit Patrol