| Acronym | Definition |
|---|
| ISNI➣Investment Strategy for Northern Ireland (UK) |
| ISNI➣International Society of Neuroimmunology (est. 1982; Rome, Italy) |
| ISNI➣Inter Syndicat National des Internes (French: National Inter-Union Internal; internal medicine) |
| ISNI➣International Standard Name Identifier (International Organization for Standardization) |
| ISNI➣Independent Service Network International |
| ISNI➣Internet Sports Network, Inc. (Palo Alto, CA) |
| ISNI➣Intermediate Signaling Network Identification |