| Acronym | Definition |
|---|
| FSW | Federal Skilled Worker (various locations) |
| FSW | Fonds Soziales Wien (German: Vienna Social Fund; Vienna, Austria) |
| FSW | Friction Stir Welding |
| FSW | Fuji Speedway (Taiwan) |
| FSW | Flight Software |
| FSW | Family Services of Westchester (Yorkers, NY) |
| FSW | Food Service Worker |
| FSW | File System Watcher |
| FSW | Free Software |
| FSW | Full Spectrum Warrior (video game) |
| FSW | Faculteit Sociale Wetenschappen (Dutch: Faculty of Social Sciences) |
| FSW | Faculty of Social Work (various universities) |
| FSW | File Share Witness |
| FSW | Female Sex Worker |
| FSW | Family Support Worker |
| FSW | Forward Swept Wing (aviation) |
| FSW | Feet of Seawater (diving) |
| FSW | Fox Sports World (cable TV channel) |
| FSW | Freestyle-Wave (windsurfing board category) |
| FSW | Fat Spanish Waiter |
| FSW | Full-Stripe Write (disks) |
| FSW | Food Service Warehouse |
| FSW | Filtered Sea Water |
| FSW | Facilitation Skills Workshop (various locations) |
| FSW | Federated Social Web (social networking) |
| FSW | Fantasy Sports Wire |
| FSW | Flute Society of Washington (Manassas, VA) |
| FSW | Federal Screw Works (St. Clair Shores, MI automotive fastener supplier) |
| FSW | Family Services Working (to Strengthen our Communities; Bridgeport, CT) |
| FSW | Flight Sim World (gaming) |
| FSW | Faso Airways - Burkina Faso (ICAO code) |
| FSW | Female Socket Weld |
| FSW | Foothill Symphonic Winds (Palo Alto, CA) |
| FSW | Fire Team Support Weapon |
| FSW | Fletcher Sutcliffe Wild Ltd. (UK) |