F ~ Qualified Fitter

F Amb ~ Field Ambulance

F.Co ~ Field Company of Engineers

F.Imp ~ Field Imprisonment

f.s ~ Feet per Second

FA ~ Field Ambulance

FA ~ Financial Adviser

FAB ~ Field Artillery Brigade

FABAIF ~ Field Artillery Brigade Australian Imperial Force

FA Bde ~ Field Artillery Brigade

FANY ~ First Aid Nursing Yeomanry

FANYC ~ First Aid Nursing Yeomanry Corps

FAO ~ Forward Area Officer (railways)

FAS ~ Free Alongside Ship

FAU ~ Friends Ambulance Unit

FAWU ~ Field Ambulance Workshop Unit

FC ~ Field Commander

FCA ~ Fat Collecting Point

FCEAIF ~ Field Company Engineers Australian Imperial Force

FCMA ~ Field Controller of Military Accounts

FCRE ~ Field Company Royal Engineers

Fcs ~ Francs

FEB ~ Free on Board

FG ~ Fine Grain (munitions)

FGA ~ Frontier Garrison Artillery

FGCM ~ Field General Court Martial

FGH ~ Fort Garry Horse (Canada)

FLC ~ Fijian Labour Contingent (later Corps)

Fld Ambs ~ Field Ambulances

FM ~ Field Marshall

FM ~ Finance Member

FNA ~ French Naval Attache

FO ~ Field Officer

FO ~ Foreign Office

FOB ~ Free on Board

FOO ~ Forward Observation Office

FOR ~ Free on Rails (railways)

F of M ~ Fulminate of Mercury (munitions)

FP ~ Field Punishment

FPD ~ Flax Production Department

FPD ~ Food Production Department

FPO ~ Field Post office

Fr ~ Franc

Fr ~ French

FRD ~ Forward Reserve Dump

FS ~ Field Service (munitions)

FS ~ Field Signalling (lamps)

FSC ~ Field Survey Company

FSD ~ Field Supply Depot

FSL ~ Field Searchlight

FSM ~ Field Service Manual

FSR ~ Field Service Regulations

FTD ~ Forward Transportation Depot

FWD ~ Four Wheel Drive