PTO
PTO stands for:
- Pacific Theater of Operations , the military actions in the Pacific War, see Pacific War #USA and Allies
- Part Time Operation , English for "only temporarily in operation"; see abbreviations / aviation / L – R # PT
- Patent and Trademark Office , United States Patent Office
- Please Turn Over , English for "please turn over"; see abbreviations / aviation / L – R # PT
- Power take-off , English for take-off
- Professional Triathletes Organization , a non-profit organization for land distance triathletes
PtO stands for:
- Platinum (II) oxide , chemical compound
Pto stands for:
- Passenger multiple unit / omnibus , former train type of the Deutsche Bundesbahn, see rail bus #Germany
pto stands for:
- ISO 639-3 code for the language of the Zo'é
