| Abbreviation | Definition |
|---|---|
| FEM | Front End Modules |
| FEPP | Front-End Power Processing |
| FERA | Fast Encoding and Readout ADC |
| FERET | Fast Encoding and REadout TDC |
| FET | Field Effect Transistor |
| FF | Flip-Flop |
| FFA | Failure to Function Adequately |
| FFFIS | Form-Fit-Funcion Interface Specification |
| FFP | Fixed Function Pipeline |
| FFP | Flat Front Projected |
| FG | Fine Gross |
| FHC | Frameless Hardware Company |
| FHC | Free Hand Controller |
| FI | Field Instrumentation |
| FIBEX | Field Bus Exchange Format |
| FIM | Failure Identification Module |
| FIMA | Fault Isolation Maintainability Analysis |
| FIMATE | Factory Installed Maintenance Automatic Test Equipment |
| FIS | Frame Information Structure |
| FIT | Failures In Time |