| Abbreviation | Definition |
|---|---|
| OVN | Online Video Network |
| OVP | Objective ViewPoint |
| OVP | Other View Point |
| OVS | Overview Video System |
| OVX | Our Voices Xposed |
| OWG | Online Writers Group |
| OWH | Omaha World Herald |
| OWM | Our Web Media |
| OXB | Denmark Blavand Radio |
| OXF | Qaqortoq Radio, 2225-2129 2265 KHz |
| OXM | Official Xbox Magazine |
| OXQ | Denmarkshavn Radio |
| OXZ | Lyngby Radio Denmark |
| OYB | Out Your Backdoor magazine |
| OYR | Aasiaat Radio |
| OYW | Our Youth Weekly |
| OYY | Daneborg Radio |
| OZC | Ozamiz City |
| OZL | Ammassalik Radio |
| OZN | Prince Christians Sund Radio |