| Acronym | Category | Meaning |
 | FTIS | NASA Acronyms | Flight Test Instrumentation System |
| FTL | Uncategorized Acronyms | Faster Than Light |
| FTL | Text Language Acronyms And Abbreviations | Faster Than Light |
| FTLOG | Text Language Acronyms And Abbreviations | For The Love Of God |
| FTM | Chemistry Acronyms | Fault Tree Model |
| FTMS | Chemistry Acronyms | Fourier Transform Mass Spectrometry |
| FTN | Text Language Acronyms And Abbreviations | F*ck That Noise |
| FTN | US Army Acronyms (Slang) | F*ck The Navy; Fun Time Navy |
| FTNMR | Chemistry Acronyms | Fourier-transform Nuclear Magnetic Resonance |
| FTO | NASA Acronyms | Flight Test Objective |
| FTO | NASA Acronyms | Functional Test Objective |
| FTOH | NASA Acronyms | Flight Team Operations Handbook |
| FTOH | NASA Acronyms | Flight Test Operations Handbook |
| FTOS | Atmospheric Research Center Acronyms | FGGE Tropical Observing System |
| FTP | Atmospheric Research Center Acronyms | File Transfer Protocol |
| FTP | Chemistry Acronyms | US Federal Test Procedure (for Exhaust Catalysts) |
| FTP | NASA Acronyms | Flight Test Procedure |
| FTP | NASA Acronyms | Full Throttle Position |
| FTP | NASA Acronyms | Function Test Progress |
| FTP | NASA Acronyms | Functional Test Program |
| FTP | Uncategorized Acronyms | File Transfer Protocol |
| FTP | US Military Acronyms | File Transfer Protocol |
| FTP | US Military Acronyms | Functional Test Procedure |
| FTP | Computer Acronyms (Common) | File Transfer Protocol |
| FTP | Computer And Internet Acronyms | File Transfer Protocol |
| FTR | Chemistry Acronyms | Frustrated Total Reflection |
| FTR | NASA Acronyms | Flight Test Requirement |
| FTR | NASA Acronyms | Functional Test Requirement |
| FTR | Text Language Acronyms And Abbreviations | For The Record |
| FTRD | NASA Acronyms | Flight Test Requirements Document |
| FTRD | NASA Acronyms | Functional Test Requirements Document |
| FTRF | Text Language Acronyms And Abbreviations | F*ck, That's Really Funny |
| FTS | Astronomy Acronyms | Flight Telerobotic Servicer |
| FTS | Atmospheric Research Center Acronyms | Fourier Transform Spectrometer |
| FTS | Atmospheric Research Center Acronyms | Federal Telecommunications System |
| FTS | Chemistry Acronyms | Fourier Transform Spectroscopy |
| FTS | NASA Acronyms | Federal Telecommunications System |
| FTS | NASA Acronyms | Flight TestSystem |
| FTS | NASA Acronyms | Flight Test Station |
| FTS | NASA Acronyms | Functional Test Specifications |
| FTS | Satellite Meterology Acronyms | Fourier Transform Spectrometer (HIS |
| FTS | US Govt. Acronyms | Federal Technology Service |
| FTS | US Military Acronyms | Federal Telecommunications System |
| FTSC | Atmospheric Research Center Acronyms | FSL Technical Steering Committee |
| FTSE | Uncategorized Acronyms | Financial Times Stock Exchange (footsie) |
| FTTA | Chemistry Acronyms | Federal Technology Transfer Act |
| FTTB | Text Language Acronyms And Abbreviations | For The Time Being |
| FTU | Chemistry Acronyms | Formazine Turbidity Unit |
| FTVS | Chemistry Acronyms | Fourier Transform Visible Spectroscopy |
| FTW | Text Language Acronyms And Abbreviations | For The Win |
| FTW | Text Language Acronyms And Abbreviations | F*ck The World |
| FTX | US Army Acronyms (Official) | Field Training Exercise |
| FU | NASA Acronyms | Flight Unit |
| FU | NASA Acronyms | Fuel |
| FU | Uncategorized Acronyms | Smoke (METAR Code) |
| FU | US Military Acronyms | Fuse |
| FU2 | Text Language Acronyms And Abbreviations | F*ck You Too |
| FUA | Atmospheric Research Center Acronyms | Fuel Use Act |
| FUB | NASA Acronyms | Forward Utility Bridge |
| FUBAR | Chatting Acronyms | Foobared Up Beyond All Recognition |
| FUBAR | Chemistry Acronyms | F(ouled) Up Beyond Recognition |
| FUBAR | Uncategorized Acronyms | Fucked/Fouled Up Beyond All Recognition/Repair |
| FUBAR | US Army Acronyms (Official) | Fucked Up Beyond Any Repair |
| FUBAR | US Army Acronyms (Slang) | F*cked Up Beyond All Recognition (Also: F*cked Up Beyond Any Recovery) |
| FUBAR | Medical Acronyms (Slang) | F*cked Up Beyond All Repair / Recognition |
| FUBAR | SMS Chat And Text Acronyms | F*cked Up Beyond All Repair / Recognition |
| FUBAR | Text Language Acronyms And Abbreviations | F*cked Up Beyond All Recognition |
| FUBB | US Army Acronyms (Slang) | F*cked Up Beyond Belief (A Worst-Case Scenario) |
| FUBB | Text Language Acronyms And Abbreviations | F*cked Up Beyond Belief |
| FUBIJAR | US Army Acronyms (Slang) | F*ck You Buddy, I Am Just A Reservist! |
| FUBIL | Medical Acronyms (Slang) | F*ck You Buddy, I'm Leaving. The Act Of A Doctor At A Small Hospital Dumping A Critically Ill Patient On Larger Hospital On Friday Afternoon Before He Leaves For The Weekend. |
| FUBIS | US Army Acronyms (Slang) | F*ck You, Buddy, I Am Shipping. Used Toward The End Of A Tour Of Duty To Indicate An Attitude Of General Apathy And Contempt. (see Also FIIGMO) |
| FUCK | Uncategorized Acronyms | For |
| FUD | NASA Acronyms | First Use Date |
| FUD | Uncategorized Acronyms | Fear |
| FUD | SMS Chat And Text Acronyms | Fear, Uncertainty, And Doubt |
| FUD | Text Language Acronyms And Abbreviations | Fear, Uncertainty, And Disinformation |
| FUGAZI | US Army Acronyms (Slang) | F*cked-up, Got Ambushed, Zipped-In |
| FUGH | Chemistry Acronyms | FREEON Unitary Group Formulation (of Hartree-Fock Theory) |
| FUJIMO | Text Language Acronyms And Abbreviations | F*ck You Jack I'm Movin' On |
| FUL | Uncategorized Acronyms | Fula Language (ISO 639-2 Code) |
| FUM | Text Language Acronyms And Abbreviations | F*cked Up Mess |
| FUMI | Chemistry Acronyms | Function Of Mutual Information |
| FUN | Atmospheric Research Center Acronyms | FL-4 Uniform Network Project |
| FUNC | NASA Acronyms | Function |
| FUNCT | NASA Acronyms | Functional |
| FUO | Medical Acronyms | Fever Of Unknown Origin |
| FUO | NASA Acronyms | Follow-up Output |
| FUPA | Medical Acronyms (Slang) | Fat Upper Pussy Area |
| FURB | Medical Acronyms (Slang) | Funny, Unusual, Rectal Blockage (people Who Use Inappropriate Objects To Insert Into The Rectum) |
| FURTB | Text Language Acronyms And Abbreviations | Filled Up And Ready To Burst |
| FUS | NASA Acronyms | Fuselage |
| FUS/LF | NASA Acronyms | Fuselage |
| FUS/UF | NASA Acronyms | Fuselage |
| FUSE | Astronomy Acronyms | Far Ultraviolet Spectroscopic Explorer |
| FUSE | Chemistry Acronyms | Far Ultraviolet Spectroscopic Explorer |
| FUSLG | NASA Acronyms | Fuselage |
| FUSRAP | Chemistry Acronyms | Formerly Utilized Sites Remedial Action Program (radioactive Materials Related) |
| FV | NASA Acronyms | FlighL Version |
| FV | NASA Acronyms | Front View |
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