| Acronym | Definition |
|---|
| FISR➣Fonds d'Intervention Stratégique Régional (French: Regional Strategic Intervention Fund; Canada) |
| FISR➣Fondo Integrativo Speciale Ricerca (Italian: Integrative Special Research Fund) |
| FISR➣Fédération Internationale Syndicaliste Révolutionnaire (French revolutionary organization) |
| FISR➣Fault Isolation and Service Restoration |
| FISR➣Fournitures Industrielles Services Rapides (French: Quick Services Industrial Supplies) |