| Abbreviation | Definition |
|---|---|
| FOS | Fundamental Operating System |
| FOSD | Feature Oriented Software Development |
| FOSE | Future of Software Engineering |
| FOSS | Free And Open Source Software |
| FOSS | Free and Open-Source Software |
| FOSS | Free and Original Source Software |
| FOSS | Free Open Source Software |
| FOSSA | Free and Open Source Software Auditing |
| FP | A Fifunctional Programming |
| FP | Fourier Processing |
| FP | Function Programming |
| FP | Functional Programming |
| fPars | Firmware Partitions |
| FPC | Free Pascal Compiler |
| FPE | Forms Processing Engine |
| FPF | FORTRAN Program File |
| FPI | Function Point Index |
| FPL | Feature Priority List |
| FPM | Fast Paged Mode |
| FPML | Financial Product Markup Language |