| Abbreviation | Definition |
|---|---|
| NNRF | Nottingham and Nottinghamshire Refugee Forum |
| NNRF | Nottingham and Notts Refugee Forum |
| NNRF | Nottingham Nottinghamshire Refugee Forum |
| NNRF | Nottingham Notts Refugee Forum |
| NOSF | National Ocean Science Forum |
| NPTF | North Pembrokeshire Transport Forum |
| NSPF | National Strategic Partnership Forum |
| NTF | National Tribal Forum |
| NTFS | New Tech Forums Society |
| OGF | Ohio Grantmakers Forum |
| OGF | Open Grid Forum |
| OH | Open Hearts |
| OKF | Otvoreni kulturni forum |
| OLF | Official Luthiers Forum |
| ONVIF | Open Network Video Integration Forum |
| ONVIF | Open Network Video Interface Forums |
| OOMF | One Ocean Marine Forum |
| OTAF | Occupational Therapy Advisory Forum |
| PAA | Paper Aeronautics Association |
| PARF | Professional Actors Resource Forum |