| Acronym | Definition |
|---|
| FOSS➣Free and Open Source Software |
| FOSS➣Future of Space Science |
| FOSS➣Faculty of Social Science |
| FOSS➣Free / Open-Source Software |
| FOSS➣Full Option Science System |
| FOSS➣Field Operations Support System |
| FOSS➣Fiber-Optic Sensor System |
| FOSS➣Field Operating Site Setup (US FEMA) |
| FOSS➣Forum of Small States (UN) |
| FOSS➣Follow-On System Stock |
| FOSS➣Fiber Optics Sonar System |
| FOSS➣Faculty Online Support Service |
| FOSS➣Field Operated Support System (immigration database; Canada) |
| FOSS➣Family Of System Study |
| FOSS➣Federal Intelligence Security Service |