| Abbreviation | Definition |
|---|---|
| NIC | Name Information Center |
| NICB | National Insurance Crime Bureau |
| NICS | National Instant Check System |
| NIF | not in force |
| NINA | New Identity Not Applicable |
| NIP | Naked In Public |
| NIP | Notice of Intended Prosecution |
| NIPAS | National Integrated Protected Areas System (Philippines) |
| NITA | National Institute Of Trial Advocacy |
| NJ | Nederlandse Jurisprudentie |
| NJ | Non-Jury |
| NJA | Non- Judicial Assessment |
| NJB | New Jersey Bankruptcy Court |
| NJC | Northwest Justice Project |
| NJD | U. S. District Court for the District of New Jersey |
| NJJ | Not Just Justice |
| NJP | National Jury Project |
| NJP | Non Judicial Punishment |
| NJP | Northwest Justice Project |
| NJS | Naval Justice School |