Found 7 full forms for FCOS
| Term | Full Form | Category |
|---|---|---|
| FCOS | Fibre Channel Over Sonet 
| Others |
| FCOS | Five Cities Orchid Society
| Others |
| FCOS | Flight Computer Operating System
| Others |
| FCOS | Flight Control Operating System
| Others |
| FCOS | Flight Control Operational Software
| Others |
| FCOS | French Creek Outdoor School
| Others |
| FCOS | Souanke, Congo
| Others |