Entertainment
- PTO: Pacific Theater of Operations, a war strategy simulation series by Koei based on the World War II events
- "P:T:O:", a track from the 1977 Klaus Schulze album Body Love
- The Phantom of the Opera (adaptations), The Phantom of the Opera-- the original novel or an adaptation (movie/musical/literature) or the Phantom character from any of these
- Please Turn Over, a 1959 British comedy film
- Promenade Theatre Orchestra, an English quartet founded in 1969
Read more about this topic: PTO