| Abbreviation | Definition |
|---|---|
| ORF | Ohio Renaissance Festival |
| OSAF | Omaha Summer Arts Festival |
| OSD | Old Settlers' Days |
| OSF | Oregon Shakespere Festival |
| OSTF | Oberlin Summer Theater Festival |
| OTFF | One Take Film Festival |
| OTFF | Oscillation Transia Film Festival |
| PAC | Plein Air Curacao |
| PAFC | Pafos Aphrodite Festival Cyprus |
| PAFF | Pezinok Amateur Film Festival |
| PCBF | Portland Craft Beer Festival |
| PCBF | Potter County Bowhunter Festival |
| PEF | Projects Events and Festivals |
| PFAF | Pacific Fine Arts Festivals |
| PFD | Post-Festival Depression |
| PFFB | Porn Film Festival Berlin |
| PFFF | Port Fairy Folk Festival |
| PFFF | Priddy Folk Fayre Festival |
| PFOR | Poole Festival of Running |
| PFOT | Peterborough Festival Of Trees |