PTO

PTO may stand for:

Please Turn Over!", an acronym commonly found on notes and letters. It is used when finding insufficient writing space on the current page, and refers the reader to material on the verso or the next page. Sometimes rearranged to "TPO", or "Turn Page Over".
Pacific Theater of Operations, World War II
Paid time off, time an employee can draw from to take time off from work, without having to specify a reason
Peeled tail-on shrimp
Permission to officiate, a limited form of license to undertake ecclesiastical duties within the Church of England
Phoenix Thunderbirds Open, a golf tournament on the LPGA Tour from 1962 to 1965
Power take-off, a splined driveshaft, usually on a tractor or truck, that can be used to provide power to an attachment or separate machine
A professional try-out agreement, a type of employment contract.

Organisations

Patent and Trademark Office (disambiguation), a government office that handles the issuing of both patents and trademarks
Parent Teacher Organization, organization that consists of parents, teachers and school staff
Peace Train Organisation, a campaign group set up in response to the repeated bombing of the Dublin to Belfast railway line
Public Telecommunications Operator, a service provider of telecommunications services such as telephony and data communications access

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