| Acronym | Definition |
|---|
| HNIS➣Havelock North Intermediate School (Havelock North, New Zealand) |
| HNIS➣Human Sodium Iodide Symporter (nuclear medicine) |
| HNIS➣Human Nutrition Information Service (USDA) |
| HNIS➣Harmful Non-Indigenous Species |
| HNIS➣Hekimian Network Interface System |