ISNI
| 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 |