| Acronym | Definition |
|---|
| INN | International Nonproprietary Names |
| INN | International Non-Proprietary Name |
| INN | Internal Network Number |
| INN | Internet News |
| INN | Intermediate Network Node |
| INN | Institute for Neurology and Neurosurgery (New York) |
| INN | Instituto Nacional de Normalización (Chile) |
| INN | Intelligent Network Node |
| INN | Insurance News Network |
| INN | Iran News Network |
| INN | Internal Network Number Indicator (routing) |
| INN | Inter Net News |
| INN | Institut National de Nanotechnologie (French: National Institute for Nanotechnology; Canada) |
| INN | Innsbruck, Austria - Kranebitten (Airport Code) |
| INN | Inter Node Network |
| INN | Internode Network |
| INN | InetNetNews |
| INN | Integrated Node Network |