| Abbreviation | Definition |
|---|---|
| NHOH | Nord-Hedmark Og Hedemarken |
| NHP | Neighborhood Health Plan |
| NHP | North Haven Partners, Inc. |
| NHPC | National Hydroelectric Power Corporation |
| NHPM | Neighborhood Health Plan of Massachusetts |
| NHPM | New Home Property Management |
| NHPWR | NewHydropower |
| NHS | Niels Husted And Son |
| NHTC | Natural Health Trends Corp |
| NHTC | Natural Hlth Trends Corp |
| NHTC | New Haven Theater Company |
| NHUU | Hub Group, Inc. |
| NHW | Noordelijke Hike Wedstrijden |
| NI | National Instruments |
| NI | National Insurance |
| NI | Needs Improvement |
| NI | Not Indicated |
| NIAC | Nissho Iwai American Corporation |
| NIACL | New India Assurance Co. Ltd. |
| NIAT | Nuclear Incident Advisory Team |