| F | Fluorine |
| F/E | Focus/exposure |
| F/I | Final Inspect |
| FA | Failure Analysis |
| FA | Factory Automation |
| FAB | Fast Atom Bombardment |
| FACS | Fast Access To Critical Solutions |
| FAMOS | Floating-gate Avalanche-injection Metal-oxide Semiconductor |
| FB | Floating Body |
| FBGA | Fine Pitch Ball Grid Array |
| FC | Flip Chip |
| FCC | Face-centered Cubic |
| FCM | Facilities Cost Model |
| FCS | Factory Control System |
| FD | Fully Depleted |
| FDA | Food And Drug Administration |
| FDC | Fault Detection And Classification |
| FDE | Frequency Domain Experiments |
| FDTD | Finite Difference Time Domain |
| Fe | Iron |
| FE | Finite Element |
| FE | Field Emission |
| FE | Field Engineer |
| FEC | Fabrication Evaluation Chip |
| FEG | Field Emission Gun |
| FEM | Finite Element Model |
| FEM | Focus-exposure Matrix |
| FEM | Final Energy Magnet |
| FEOL | Front End-of-line |
| FESEM | Field Emission Scanning Electron Microscope/microscopy |
| FET | Field-effect Transistor |
| FFT | Fast Fourier Transform |
| FFU | Filter Fan Unit |
| FG | Finished Goods |
| FG | Forming Gas |
| FI | Filterability Index |
| FI | Factory Integration |
| FIA | Field Interferometer Alignment |
| FIB | Focused Ion Beam |
| FID | Flame Ionization Detector |
| FIDAP | Fluid Dynamics Analysis Package |
| FIFO | First-in, First-out |
| FIM | Field Ion Microscope |
| FIMA | Factory Integration Maturity Assessment |
| FIMS | Front-opening Interface Mechanical Standard |
| FIT | Failure Unit |
| FITS | Failures In Time |
| FL | Fuzzy Logic |
| FLOODS | Florida Object-Oriented Device Simulator |
| FLOOPS | Florida Object-Oriented Process Simulator |
| FLOPC | Floating Point Operations Needed Per Cycle |
| FLOTOX | Floating Gate Tunnel Oxide |
| FLRT | Factory Layout/relayout Tool |
| Fm | Fermium |
| FM | Foreign Material |
| FMEA | Failure Mode And Effects Analysis |
| FMMC | Factory Material Movement Component |
| FMS | Forms Management System |
| FMS | Facility Management System |
| FMVP | Framework Member Validation Project |
| FNN | Feed-forward Neural Network |
| FOCS | Fiber Optic Chemical Sensors |
| FOSB | Front Opening Shipping Box |
| FOUP | Front Opening Unified Pod |
| FOV | Field Of View |
| FOX | Field Oxide |
| FP | Flash Point |
| FPD | Focal Plane Deviation |
| FPD | Flat Panel Display |
| FPGA | Field-programmable Gate Array |
| FPLA | Field-programmable Logic Array |
| FPLF | Field-programmable Logic Family |
| FPLS | Field-programmable Logic Switch |
| FPM | Flexual Plate Mode |
| FPMS | Factory Performance Modeling Software |
| FPROM | Field-programmable Read-only Memory |
| FQA | Fixed Quality Area |
| Fr | Francium |
| FRACAS | Failure Reporting, Analysis, And Corrective Action System |
| FRAME | Failure Rate Analysis And Modeling |
| FRMB | Fast Ramp Mini Batch |
| fRTA | Flash Rapid Thermal Annealing |
| FS | Fused Silica |
| FSE | Field Service Engineers |
| FSG | Fused Silica Glass |
| FSG | Fluorinated Silicate Glass |
| FSM | Finite State Machine |
| FT | Final Test |
| FT | Fourier Transform |
| FTA | Fault Tree Analysis |
| FTAB | Focus Technical Advisory Board |
| FTICR | Fourier Transform Ion Cyclotron Resonance Spectroscopy |
| FTIR | Fourier Transformed Infrared |
| FTP | Fast Thermal Processing |
| FW | Full Wave |
| FWHM | Full-width Half-maximum |
| FWT | Fluoride Wastewater Treatment |
| FZ | Float Zone |