| Abbreviation | Definition |
|---|---|
| OSE | Original Special Edition |
| OSF | Old Style Figures |
| OSM | Open Standard Media |
| OSN | Orion Syndicate Network |
| OSQ | Open Source Quarterly |
| OSR | Out Station Reporter |
| OST | Original Sound Track |
| OST | Original Soundtrack The |
| OSW | Open Systems World |
| OT | Original Trilogy |
| OT | Other Topic |
| OTB | Only The Brave |
| OTC | Original Trilogy Collection |
| OTE | On The Edge |
| OTE | One Time Exclusive |
| OTF | Of The Film |
| OTG | Out The Gate |
| OTGW | Over the Garden Wall |
| OTL | One True Love |
| OTM | On The Media |