| Acronym | Definition |
|---|
| FSN➣Federal Stock Number |
| FSN➣Fonds Spécial du Nigéria (French: Nigeria Trust Fund) |
| FSN➣Family Support Network |
| FSN➣Fonds National pour la Société Numérique (French: National Fund for the Digital Society) |
| FSN➣Fox Sports Network |
| FSN➣Food Safety Network (University of Guelph) |
| FSN➣Factory Serial Number (manufacturing tracking number) |
| FSN➣Fondo Sanitario Nazionale (Italian: National Health Fund) |
| FSN➣Free Sites Network |
| FSN➣File System Network |
| FSN➣Fail Safe Network |
| FSN➣Forward Sequence Number |
| FSN➣Foreign Service National |
| FSN➣Financial Sense Newshour (radio show) |
| FSN➣Full Service Network |
| FSN➣Fate/Stay Night (visual novel) |
| FSN➣Fédération Suisse de Natation (French: Swiss Swimming Federation) |
| FSN➣Financial Safety Net |
| FSN➣Federatie Sloeproeien Nederland (Dutch rowing federation) |
| FSN➣Fédération Suisse des Notaires (French: Swiss Federation of Notaries) |
| FSN➣Forward Sequence Number (SS7 MTP Layer 2) |
| FSN➣Food Service Network (Japan) |
| FSN➣Frontul Salvarii Nationale (Romanian: National Rescue Front) |
| FSN➣Free Sites Network (domain registrar) |
| FSN➣Filter Smoke Number (engine test) |
| FSN➣Ford Supplier Network |
| FSN➣Fiscal Station Number |
| FSN➣Fiber Security Network |
| FSN➣Freedom Song Network (San Francisco, CA) |
| FSN➣French-Speaking Nation |
| FSN➣File Serial Number |