| F&L | Ferrari e Lamborghini 
| Others |
| F&L | Fuels and Lubricants
| Others |
| F/L | Flight Leftenant
| Others |
| F/L | Flight Lieutenant
| Others |
| FL | AFATDS Lightweight Computer Unit
| Others |
| FL | Fabio Luisi
| Others |
| FL | Facilitation Letter
| Others |
| FL | FaiL
| Others |
| FL | Fairy Land
| Others |
| FL | Faith Library
| Others |
| FL | Fake Laugh
| Others |
| FL | Fake Love
| Others |
| FL | Family Law
| Others |
| FL | Family Lines System
| Others |
| FL | Fan Listing
| Others |
| FL | Farm Labor
| Others |
| FL | Faroe League
| Others |
| FL | Fast and Light
| Others |
| FL | Fast Lane
| Others |
| FL | Fast Light
| Others |
| FL | Fat Larry
| Others |
| FL | Feed Line
| Others |
| FL | Feet Long
| Others |
| FL | Fei Long
| Others |
| FL | Femur Length
| Others |
| FL | Fetal Length
| Others |
| FL | Fiber Link
| Others |
| FL | Figure Lamp
| Others |
| FL | File List
| Others |
| FL | filter
| Others |
| FL | Final Legacy
| Others |
| FL | Financial Loss
| Others |
| FL | Find a Local
| Others |
| FL | Fine Line
| Others |
| FL | Fine Lookin
| Others |
| FL | First and Last
| Others |
| FL | First Lady
| Others |
| FL | First Leftmost
| Others |
| FL | First Level
| Others |
| FL | First Love
| Others |
| FL | Fixed Legs
| Others |
| FL | flag
| Others |
| FL | Flank
| Others |
| FL | Flawless Language
| Others |
| FL | Flemish Lion
| Others |
| Fl | flerovium
| Others |
| FL | FLexion
| Others |
| FL | Flight Level
| Others |
| FL | Flipper
| Others |
| FL | Floating Lagoon
| Others |
| FL | Floor Laughing
| Others |
| FL | Floor Level
| Others |
| FL | Florida
| State |
| FL | Florida also
| Others |
| FL | Florida Long
| Others |
| FL | Floruit Latin
| Others |
| FL | Flourescent Lamp
| Others |
| FL | FLourit (flourished, living)
| Others |
| fl | flow
| Others |
| FL | Flow Line
| Others |
| FL | Fluctuating Link
| Others |
| FL | FLuid
| Others |
| FL | Fluid Loss
| Others |
| FL | Fluorescent Lighting
| Others |
| FL | FLuoride
| Others |
| FL | Flux Library
| Others |
| FL | Flying Leads
| Others |
| FL | Focal Length
| Others |
| FL | Folding Lavatory
| Others |
| FL | Folding Lip
| Others |
| FL | Foot Lambert
| Others |
| FL | Foot Lamberts
| Others |
| FL | Forbidden Land
| Others |
| FL | Force Level
| Others |
| FL | Force Load
| Others |
| FL | Foreign Language
| Others |
| FL | Forest Land
| Others |
| FL | Fork Length
| Others |
| FL | Format List
| Others |
| FL | Formula Libre
| Others |
| FL | Formula Lightning
| Others |
| FL | Fort Lee
| Others |
| FL | Fort Lewis
| Others |
| FL | Fortran Library
| Others |
| FL | Forward Link
| Others |
| FL | Fragrance Level
| Others |
| FL | Franco Lubinsky (Sailplane Manufacturer)
| Others |
| FL | Freakin Loser
| Others |
| FL | Fredrik Lundstedt
| Others |
| FL | Free Lime
| Others |
| FL | Freelancer
| Others |
| FL | Freight Liner
| Others |
| FL | French Letter [slang: condom]
| Others |
| FL | French Lick
| Others |
| FL | Frequency Lock
| Others |
| FL | Fricken Light
| Others |
| FL | Friggin Loser
| Others |
| FL | Front Left
| Others |
| FL | Front Line
| Others |
| FL | Front Liners
| Others |
| FL | Front Living
| Others |
| FL | Front Living room
| Others |
| FL | Front Loader
| Others |
| FL | Fruit Loops
| Others |
| FL | Fruity Loops
| Others |
| FL | Fuerstentum Liechtenstein
| Others |
| FL | Full Length
| Others |
| FL | Full Load
| Others |
| FL | Function Level
| Others |
| FL | Furchtbar Lokker
| Others |
| FL | Furstentum Liechtenstein
| Others |
| FL | Furstentun Liechtenstein
| Others |
| FL | Fuzzy Logic
| Others |
| FL | Sound (Floating format) (hardware dependant not transportable)
| Others |
| fl. | flourished (biog dates)
| Others |
| fl. | flower (bot.)
| Others |