| Acronym | Category | Meaning |
 | FF | Computer And Internet Acronyms | Form Feed |
| FF | SMS Chat And Text Acronyms | Friends Forever |
| FF | Text Language Acronyms And Abbreviations | Friends Forever |
| FF&PN | Text Language Acronyms And Abbreviations | Fresh Fields And Pastures New |
| FF-MBPT | Chemistry Acronyms | Finite-field Many-body Perturbation Theory |
| FFA | Chemistry Acronyms | Flammable Fabrics Act |
| FFA | Chemistry Acronyms | Free Fatty Acid |
| FFA | Uncategorized Acronyms | Forum Fisheries Agency -Free-Fire Area - Fusiform Face Area - Football Federation Australia - Future Farmers Of America (today The National FFA Organization) |
| FFAR | Chemistry Acronyms | Fuel And Fuel Additive Registration |
| FFB | US Govt. Acronyms | Federal Financing Bank |
| FFBD | NASA Acronyms | Functional Flow Block Diagram |
| FFC | NASA Acronyms | Final Flight Certification |
| FFC | Uncategorized Acronyms | Free For Chat |
| FFCA | Chemistry Acronyms | Federal Facility Compliance Act |
| FFCC | Astronomy Acronyms | Free-Flyer Control Centre |
| FFD | NASA Acronyms | FixedFormatDisplay |
| FFD | NASA Acronyms | Functional Flow Diagram |
| FFDCA | Atmospheric Research Center Acronyms | Federal Food, Drug, And Cosmetic Act (US) |
| FFDCA | Chemistry Acronyms | Federal Food, Drug, And Cosmetic Act (US) |
| FFDID | Medical Acronyms (Slang) | Found Face Down In Ditch |
| FFDIG | Medical Acronyms (Slang) | Found Face Down In Gutter |
| FFE | Chemistry Acronyms | Free Flow Electrophoresis |
| FFE | Uncategorized Acronyms | Fukuoka Futures Exchange |
| FFEM | Chemistry Acronyms | Freeze-fracture Electron Microscopy |
| FFF | Chemistry Acronyms | Field-flow Fractionation |
| FFF | Uncategorized Acronyms | F?d?ration Fran?aise De Football (French |
| FFFF | Medical Acronyms (Slang) | See 4F (Fat, Fair, Female, Forty = Gall Bladder Disease) |
| FFFSG | Chemistry Acronyms | Fossil Fuel Fired Steam Generator |
| FFG | Uncategorized Acronyms | Guided Missile Frigate (hull Classification Symbol) |
| FFG | US Military Acronyms | Guided Missile Frigate |
| FFIB | US Military Acronyms | Fuel Filter Impending Bypass |
| FFIBL | US Military Acronyms | Fuel Filter Impending Bypass, Left Engine |
| FFIBR | US Military Acronyms | Fuel Filter Impending Bypass, Right Engine |
| FFIS | Chemistry Acronyms | Federal Facilities Information System |
| FFITP | Chemistry Acronyms | Free-flow Isotachophoresis |
| FFM | Chemistry Acronyms | Finite Field Method (in Mol. Polarizabilities Calcns.) |
| FFM | Chemistry Acronyms | Friction Force Microscopy |
| FFM | NASA Acronyms | Free-Flying (Experiment) Module |
| FFM | US Military Acronyms | Fuel Flow Monitor |
| FFOV | Uncategorized Acronyms | Forward Field Of View |
| FFP | Atmospheric Research Center Acronyms | Firm Fixed Price |
| FFP | Chemistry Acronyms | Femtosecond Flash Photolysis |
| FFP | Chemistry Acronyms | Fresh Frozen Plasma |
| FFP | NASA Acronyms | Firmed Fixed Price |
| FFP | US Military Acronyms | Fixed Fee Procurement |
| FFPC | Chemistry Acronyms | Forced-flow Planar Chromatog. |
| FFPE | Chemistry Acronyms | Formalin-fixed Paraffin-embedded |
| FFR | Uncategorized Acronyms | Fédération Française De Rugby (French Rugby Federation) |
| FFR | US Military Acronyms | Forward Firing Rocket, Chaff Head (mk-84) |
| FFRDC | US Military Acronyms | Federally Funded Research & Development Center |
| FFRDCS | Atmospheric Research Center Acronyms | Federally Funded Research And Development Centers |
| FFS | Atmospheric Research Center Acronyms | Flight Facilities Survey |
| FFS | Chatting Acronyms | For Foobars Sake |
| FFS | Chemistry Acronyms | Flame Fluorescence Spectroscopy |
| FFS | Uncategorized Acronyms | For Fuck's Sake |
| FFS | US Military Acronyms | Force Feel System |
| FFS | Computer And Internet Acronyms | Flash File System |
| FFS | SMS Chat And Text Acronyms | For F*cks Sake |
| FFS | Text Language Acronyms And Abbreviations | For F*ck Sake |
| FFSHC | Chemistry Acronyms | Field Federal Safety And Health Councils |
| FFT | Astronomy Acronyms | Fast Fourier Transform |
| FFT | Atmospheric Research Center Acronyms | Fast Fourier Transform |
| FFT | Chemistry Acronyms | Fast Fourier Transform |
| FFT | Uncategorized Acronyms | Fast Fourier Transform - Final Fantasy Tactics |
| FFTB | Chemistry Acronyms | Final Focus Test Beam |
| FFTF | Atmospheric Research Center Acronyms | Fast Flux Test Facility |
| FFTF | Chemistry Acronyms | Fast Flux Test Facility |
| FFTO | NASA Acronyms | Free-Flying Teleoperator |
| FFTS | Atmospheric Research Center Acronyms | Fast-Fourier Transforms |
| FFV | Chemistry Acronyms | Flexible Fuel Vehicle |
| FFZE | Chemistry Acronyms | Free-flow Zone Electrophoresis |
| FG | Uncategorized Acronyms | Femtogram |
| FG | Uncategorized Acronyms | Fog (METAR Code) - French Guiana (FIPS 10-4 Territory Code) |
| FGAN | Chemistry Acronyms | Fertilizer Grade Ammonium Nitrate |
| FGCMS | Atmospheric Research Center Acronyms | Fast GC / MS = Fast Gas Chromatography / Mass Spectrometry |
| FGD | Chemistry Acronyms | Flue Gas Desulfurization |
| FGDAI | Text Language Acronyms And Abbreviations | Fuhgedaboudit (Forget About It) |
| FGDIS | Chemistry Acronyms | Flue Gas Desulfurization Information System |
| FGEF | Chemistry Acronyms | Federal Geographic Encoding Format |
| FGETS | Chemistry Acronyms | Food And Gill Exchange Of Toxic Substances |
| FGF | Chemistry Acronyms | Fibroblast Growth Factor |
| FGFR | Chemistry Acronyms | Fibroblast Growth Factor Receptor |
| FGGE | Atmospheric Research Center Acronyms | First GARP Global Experiment |
| FGGE | Chemistry Acronyms | First GARP Global Experiment |
| FGH | Chemistry Acronyms | Fourier-grid Hamiltonian |
| FGHAZ | Chemistry Acronyms | Fine Grain Heat-affected Zone |
| FGM | Chemistry Acronyms | Functionally Gradient Materials |
| FGR | Chemistry Acronyms | Flue Gas Recirculation |
| FGRM | Chemistry Acronyms | Fourier-grid R-matrix Formalism (in Scattering Problems) |
| FGS | Astronomy Acronyms | Fine Guidance Sensors |
| FGSE | Chemistry Acronyms | Field-gradient Spin-echo |
| FH | NASA Acronyms | Flex Hose |
| FH | Uncategorized Acronyms | Femtohenry |
| FH | US Military Acronyms | Flight Hours |
| FHA | US Govt. Acronyms | Federal Housing Administration |
| FHBS | Chemistry Acronyms | Finite Hilbert Basis Set |
| FHC | NASA Acronyms | Flight Half Coupling |
| FHCP | Chemistry Acronyms | Federal Hazard Communication Program |
| FHD | NASA Acronyms | Fixed Head Disk |
| FHF | NASA Acronyms | First Horizontal Flight |
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