| Abbreviation | Definition |
|---|---|
| NOMS | Northern Ohio Medical Specialists |
| NONA | New Orleans N' Athens |
| NOOD | National Offshore One Design |
| NOP | Nederlandse Opvang Papaegaaien |
| NOPC | National Oil Production Company |
| NOPG | Night Owl Paper Goods |
| NOPI | Number One Parts Inc |
| NOPI | Number One Parts, Inc. |
| NOPTI | National Organization of Professional Teachers Inc |
| NOR | New Orleans Refining |
| NOR | New Orleans Refining |
| NORM | North's Online Research Machine |
| NOS | Nederlandse Omroep Stichting |
| NOSI | NANA Oilfield Services Inc |
| NOSI | Navasota Oilfield Services Inc |
| NOTW | Not Of This World |
| NOV | Nova Media, Inc. |
| NOVA | Northstar Online Virtual Access |
| NOW | No Opportunity Waits |
| NOWL | Northern Offshore Wind, Limited |