| Abbreviation | Definition |
|---|---|
| NUHC | New United Hotel Consultancy |
| NVIF | National Visitors Information Framework |
| NVS | National Visitor Survey |
| NYAC | New York Adventure Club |
| NYAT | New York Apple Tours |
| O | Oldenburg |
| OBDT | Office of Business Development and Tourism |
| OBH | Ocean Beach Hotel |
| OBTA | Oberon Business and Tourism Association |
| OBTA | Oregon Business Travel Association |
| OBV | Outer Banks Vacation |
| OCTB | Osaka Convention Tourism Bureau |
| ODTA | Organization Defense Travel Administrator |
| ODTA | Organizational Defense Travel Administration |
| ODTA | Organizational Defense Travel Administrator |
| ODTA | Organizational Defense Travel Administrators |
| OGDP | Ocean Grove Holiday Park |
| OHB | Online Hotel Booking |
| ONTT | Office National du Tourisme |
| ONTT | Office national du tourisme tunisien |