| Acronym | Definition |
|---|
| FISN➣Federazione Italiana Sci Nautico (Italian Water Ski Federation) |
| FISN➣Federally Insured Savings Network |
| FISN➣Fédération Internationale pour la Santé Naturelle (French: International Federation for Natural Health) |
| FISN➣First Internet Securities Network (Bethesda, MD) |
| FISN➣Financial Instrument Short Name (ISO 18774) |