| Abbreviation | Definition |
|---|---|
| ODC | Omega Dance Company |
| OEBR | Original Edition By Rahbek |
| OFA | Office For the Arts |
| OG | Opera Ghost |
| OLRC | Old Lyric Repertory Company |
| OLT | Ottawa Little Theatre |
| OLT | Ouichita Little Threatre |
| OMAI | Office of Multicultural Arts Initiatives |
| OMTM | Oh Man The Mountain |
| ONCA | One Network for Conservation and the Arts |
| OOBA | Off Off Broadway Alliance |
| OPAC | Orpheum Performing Arts Center |
| OPAC | Overtown Performing Arts Center |
| OPAS | Oconee Performing Arts Society |
| OPAS | Oregon Performing Arts Studio |
| OQRF | O Que as Ruas Falam |
| OSF | Oregon Shakespeare Festival |
| OTC | Our Time Cabaret |
| OTCD | On The Capitol Doorstep |
| OTNV | Opera Theatre Of Northern Virginia |