| Abbreviation | Definition |
|---|---|
| NWM | Non- White Male |
| NWM | Nowhere, Man! |
| NWO | No Way Out |
| NWO | NOrthWest Ordnance of 1783 |
| NYC | Not Yet Competent |
| NYCD | New York Capital District |
| NYCLU | New York Civil Liberties Union |
| NYSBA | New York State Bar Association |
| NYW | Western District of New York of the United States Attorneys Office |
| NZSC | New Zealand Supreme Court |
| O | Obedience |
| O | Obedient |
| OAA | Older Americans Act |
| OAC | Office of the Administrator for the Courts ( Washington) |
| OAC | Ohio Administrative Code |
| OAH | Office of Administrative Hearings (Washington) |
| OAP | Old Age Person |
| OAPCA | Olympic Air Pollution Control Authority |
| OAR | Offender Aid And Restoration |
| OATH | Office of Administrative Trials and Hearings |