English abbreviations from fn to fo
- FN(Fabrique Nationale (Manufacturer))
- FNA(Functional Needs Analysis)
- FNAC(Fine Needle Aspiration Cytology)
- FNAWS(Foundation For North American Wild Sheep)
- FNB(Neubrandenburg Airport)
- FNBA(Flexible Narrow Beam Adapter)
- FNBDT(Future Narrow Band Digital Terminal)
- FNBVT(Future Narrow Band Voice Terminal)
- FNC(Madeira Airport)
- FND(Friday Night Drawing)
- FNE(Fane Airport)
- FNF(Fight No Further)
- FNG(Fucking New Guy)
- FNH(Fincha Airport)
- FNHH(Friday Night Hardcore Havoc)
- FNI(Garons Airport)
- FNJ(Pyongyang Sunan International Airport)
- FNL(Fort Collins-Loveland Municipal Airport)
- FNMOD(Fleet Numerical Meteorological and Oceanographic Detachment)
- FNN(Feed-forward Neural Network)
- FNOC(Fleet Numerical Oceanographic Command)
- FNP(Florida Newspaper Project)
- FNPG(Friends of the National Parks at Gettysburg)
- FNR(Funter Bay Seaplane Base)
- FNS(Food and Nutrition Service)
- FNSL(Frogans Network System Language)
- FNSRO(Food and Nutrition Service Regional Office)
- FNT(Bishop International Airport)
- FNW(Far North Wrestling)
- FO(Forward Observer)
- F.O.(Flight Officer)
