| Abbreviation | Definition |
|---|---|
| OTIA | Oklahoma Travel Industry Association |
| OTLA | Ohio Tourism Leadership Academy |
| OTLA | Oregon Tourism Leadership Academy |
| OTMPC | Ontario Tourism Marketing Partnership Corporation |
| OTRD | Oklahoma Tourism and Recreation Department |
| OTRR | Online Travel Reimbursement Request |
| OTT | Online Travel Training |
| OTTA | Oregon Tour and Travel Alliance |
| OTTO | One Trip Travel Order |
| OVT | One View Travel |
| OWTS | Online World Travel System |
| PATTA | Port Arthur and Tasman Tourism Association |
| PCHK | Pearl Continental Hotel Karachi |
| PCHL | Pearl Continental Hotel Lahore |
| PDDT | Port Douglas Daintree Tourism |
| PDOT | Philippines Department Of Tourism |
| PDRT | Postgraduate Diploma in Recreation and Tourism |
| PET | Paperless Employee Travel |
| PGTS | Pet Gear Travel System |
| PHASA | Professional Hunters Association of South Africa |