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F&F
abbr., avia.	fire and forget
abbr., busin.	fuel and food; fuel and forage
abbr., mil.	Fire-and-Forget
abbr., O&G, casp.	flora and fauna (raf)
abbr., oil	fuels & fractionation; furniture and fixture
abbr., scottish	Fire & Forget (missile guidance)
energ.ind.	facts and figures
F/F
abbr., exhib.	freight forwarder
abbr., oil	fire fighting (andrushin); face to face; fast forward
abbr., radio	flip-flop
abbr., scottish	Front Frame
abbr., space	first flight
mil.	field of fire
F.F.
abbr.	Flush-face (A Hun)
abbr., econ.	French Franc
abbr., lat.	Fieri Fecit ("caused to be made")
abbr., mining.	fine fill; flat face
F.&F.
abbr.	Foster and Finlason's Nisi Prius Reports; furniture and fixture
F-F
abbr., earth.sc.	Frasnian-Famennian
abbr., space	form feed
f.f.
abbr., earth.sc.	fixed focus
abbr., econ.	folio
insur.	Following
f&f
abbr., insur.	furniture and fixtures
F /F
abbr., auto.	front engine /front wheel drive
F F
abbr., oil	coefficient of friction

F&F: 13 phrases in 2 subjects

Abbreviation	12
NASDAQ	1