| Abbreviation | Definition |
|---|---|
| NYN | New York News |
| NYSBN | New York State Broadcast Network |
| NYSWI | New York State Writers Institute |
| NYT | New York Times |
| NZPC | New Zealand Press Council |
| NZT | New Zork Times |
| OAL | Open Audio License |
| OAN | One America News |
| OANN | One America News Network |
| OBND | Openbve News and Development (gaming forum) |
| OCN | Orthodox Christian News |
| OCR | Optical Character Recognition |
| OCW | On Camouflaged Wings |
| ODAAT | One Day At A Time |
| ODCR | On Demand Commercial Ratings |
| ODJ | OsterDowJones Commodity News |
| ODN | Oliver Daily News |
| ODN | On Demand News |
| ODW | Old Dominion X Press |
| OED | Oxford English Dictionary |