| Abbreviation | Definition |
|---|---|
| FID | Free Induction Decay |
| FID | Hydrogen-air flame ionization detector |
| FIM | Far-Infrared Maser |
| FIM | Field Intensity Meter |
| FIM | Field Ion Microscope |
| FIM | Functional Imaging Method |
| FIMD | Fluorescence-Imaged MicroDeformation |
| FIMS | Fast Integrated Mobility Spectrometer |
| FIMS | Field Intensity Measuring Sustem |
| FINCH | Fresnel Incoherent Correlation Holography |
| FIOA | Fellow of the Institute of Acoustics |
| FIOP | Field Induced Ordered Phase |
| FIP | Forum on International Physics |
| FIPEM | Fellowship Institute of Physics and Engineering in Medicine |
| FIPS | First Interactive Partition Splitter |
| FIR | Far-InfraRed |
| FIRI | Fourth International Radiocarbon Intercomparison |
| FISCO | Fieldbus Instrinsic Safety Concept |
| FIZIK | Physics |
| FLAP | Flexible Learning Approach To Physics |