| Acronym | Category | Meaning |
| FACO | NASA Acronyms | Factory Acceptance Checkout |
| FACO | NASA Acronyms | Factory Assembly And Checkout |
| FACO | NASA Acronyms | Final Assembly Checkout |
| FACOSH | Chemistry Acronyms | Federal Advisory Council For Occupational Safety And Health |
| FACS | Chemistry Acronyms | Fluorescence Atom-coincidence Spectroscopy |
| FACS | Chemistry Acronyms | Fluorescence-activated Cell Sorting |
| FACS | NASA Acronyms | Facilities Control |
| FACS | NASA Acronyms | Finance And Control System |
| FACS | Uncategorized Acronyms | Formal Aspects Of Computing Science - Fluorescent-activated Cell Sorting |
| FACSS | Chemistry Acronyms | Federation Of Analytical Chemistry And Spectroscopy Societies |
| FACT | Chemistry Acronyms | Facility For The Analysis Of Chemical Thermodynamics |
| FACT | Chemistry Acronyms | Fuel And Combustion Technology |
| FACT | NASA Acronyms | Flexible Automatic Circuit Tester |
| FACTS | Chemistry Acronyms | Facilities And Company Tracking System |
| FACTS | Uncategorized Acronyms | Flexible Alternating Current Transmission System |
| FACTS | US Military Acronyms | Flip Augment Cobra Tow Sight |
| FAD | Chemistry Acronyms | Failure Assessment Diagram |
| FAD | Chemistry Acronyms | Flavin Adenine Dinucleotide |
| FAD | NASA Acronyms | Final Approach Display |
| FAD | Uncategorized Acronyms | Flavin Adenine Dinucleotide |
| FAD | US Military Acronyms | Funding Authorization Document |
| FADAC | Uncategorized Acronyms | Field Artillery Data Computer |
| FADD | Chemistry Acronyms | Fas-associated Death Domain Protein |
| FADEC | Chemistry Acronyms | Full Authority Digital Engine Control |
| FADEC | US Military Acronyms | Full Authority Digital Engine Control |
| FADECAL | US Military Acronyms | Fadec, Channel A, Left Engine |
| FADECAR | US Military Acronyms | Fadec, Channel A, Right Engine |
| FADECBL | US Military Acronyms | Fadec, Channel B, Left Engine |
| FADECBR | US Military Acronyms | Fadec, Channel B, Right Engine |
| FADIGAL | US Military Acronyms | Fault Diagnostics, Channel A, Left Engine |
| FADLIM | US Military Acronyms | Fadec On Limit |
| FAEC | Chemistry Acronyms | Factor Analysis With Equilibrium Constraints |
| FAES | Chemistry Acronyms | Flame Atomic Emission Spectroscopy |
| FAEWS | US Military Acronyms | Fleet Airborne Electronic Warfare System |
| FAF | NASA Acronyms | First Aerodynamic Flight |
| FAFS | Chemistry Acronyms | Flame Atomic Fluorescence Spectroscopy |
| FAGE | Chemistry Acronyms | Fluorescence Assay With Gas Expansion |
| FAGS | Atmospheric Research Center Acronyms | Federation Of Astronomical And Geophysical Services |
| FAGS | Chemistry Acronyms | Federation Of Astronomical And Geophysical Services |
| FAH | Uncategorized Acronyms | Federation Of American Hospitals - Fine Arts And Humanities - Foreign Affairs Handbook |
| FAH | Text Language Acronyms And Abbreviations | F*cking-A Hot |
| FAH | Text Language Acronyms And Abbreviations | Funny As Hell |
| FAHQT | Computer And Internet Acronyms | Fully Automatic High-Quality Translation |
| FAI | Uncategorized Acronyms | F?d?ration A?ronautique Internationale (French |
| FAIL | US Military Acronyms | Failure |
| FAIMS | Chemistry Acronyms | High-field Asymmetric Waveform Ion Mobility Spectrometry |
| FAINTED | US Army Acronyms (Slang) | Faked An Injury, Necessary To Escape Duty |
| FAIR | NASA Acronyms | Fabrication |
| FAIR | US Military Acronyms | Financial Accounting & Inventory Record |
| FAK | Chemistry Acronyms | Focal Adhesion Kinase |
| FAKE | Chemistry Acronyms | Fast Accurate Kinetic-energy (MO Method) |
| FAL | Atmospheric Research Center Acronyms | Frontier Airline |
| FAL | NASA Acronyms | First Approach And Landing (Test) |
| FALS | Chemistry Acronyms | Familial Amyotrophic Lateral Sclerosis |
| FALT | US Military Acronyms | Final Altitude |
| FAM | Chemistry Acronyms | Friable Asbestos-containing Material |
| FAM | NASA Acronyms | Familiarization |
| FAM | Uncategorized Acronyms | Foreign Affairs Manual |
| FAMA | Chemistry Acronyms | Fluorescent Antibody Membrane Antigen |
| FAME | Atmospheric Research Center Acronyms | Florida Area Mesoscale Experiment |
| FAME | Atmospheric Research Center Acronyms | Formatting And Multiplexing Equipment |
| FAME | Chemistry Acronyms | Fatty Acid Methyl Ester |
| FAMOS | Chemistry Acronyms | Floating-gate Avalanche-injection Metal-oxide Semiconductor |
| FAMOS | NASA Acronyms | Flight Acceleration Monitor Only System |
| FAMOS | Computer And Internet Acronyms | Floating Gate Avalanche MOS |
| FAMOUS | Chemistry Acronyms | French-American Mid-Ocean Undersea Study |
| FAN | Atmospheric Research Center Acronyms | File Array Notation |
| FANES | Chemistry Acronyms | Furnace Atomization Non-thermal Emission Spectrometry |
| FANFARE | US Military Acronyms | Navy Torpedo Countermeasures Sys For Ships |
| FANNIE MAE | US Govt. Acronyms | Federal National Mortgage Association |
| FAO | Atmospheric Research Center Acronyms | Food And Agriculture Organization |
| FAO | Chemistry Acronyms | Food And Agriculture Organization |
| FAO | Chemistry Acronyms | Floating Atomic Orbital |
| FAO | Chemistry Acronyms | Frozen Atomic Orbital |
| FAO | NASA Acronyms | Flight Activities Officer |
| FAO | Organizations Acronyms | Food And Agriculture Organization Of The United Nations |
| FAO | Uncategorized Acronyms | Food And Agriculture Organization |
| FAO | Uncategorized Acronyms | Faroese Language (ISO 639-2 Code) |
| FAO | US Govt. Acronyms | Food And Agriculture Organization |
| FAOS | Chemistry Acronyms | Fluorescent Activated Organelle Sorting |
| FAP | Astronomy Acronyms | Freedom Attached Payloads |
| FAP | Chemistry Acronyms | Familial Adenomatous Polyposis |
| FAP | Chemistry Acronyms | Familial Amyloidotic Polyneuropathy |
| FAP | Human Genome Acronyms | Familial Adenomatous Polyposis |
| FAP | NASA Acronyms | Final Approach Plane |
| FAP | Text Language Acronyms And Abbreviations | F*cking-A Pissed |
| FAPAS | Chemistry Acronyms | Food Analysis Performance Assessment Scheme |
| FAPES | Chemistry Acronyms | Furnace Atomization Plasma Emission Spectrometry |
| FAPRS | US Govt. Acronyms | Federal Assistance Programs Retrieval System ˜˜(replaced By CFDA) |
| FAPS | Atmospheric Research Center Acronyms | Fate Of Atmospheric Pollutants Study |
| FAPS | Atmospheric Research Center Acronyms | Freedom Attached Payloads |
| FAPS | Chemistry Acronyms | Field-effect-addressable Potentiometric Sensor |
| FAQ | Atmospheric Research Center Acronyms | Frequently Asked Questions |
| FAQ | Chatting Acronyms | Frequently Asked Question |
| FAQ | Uncategorized Acronyms | Frequently Asked Questions (sometimes Pronounced Fak) |
| FAQ | Computer Acronyms (Common) | Frequently Asked Questions |
| FAQ | Computer And Internet Acronyms | Frequently Asked Questions |
| FAQ | SMS Chat And Text Acronyms | Frequently Asked Questions |
| FAQL | Text Language Acronyms And Abbreviations | Frequently Asked Questions List |
| FAR | Chemistry Acronyms | Federal Acquisitions Regulations |