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IOF abbr.
abbr.	Intelligence Operations Facility; International Olympic Foundation
abbr., anat.	inferior orbital fissure (нижняя глазничная щель, fissuга orbitalis inferior doc090)
abbr., anim.husb.	Institute of Ocean Fisheries (China)
abbr., comp., net.	input-output front end
abbr., el.	input/output function; interactive operations facility
abbr., file.ext.	Infrared Optical Film
abbr., fin.	internet of finance
abbr., med.	International Operation Forces
abbr., mil., air.def.	input-output function
abbr., mil., avia.	instant of failure
abbr., nautic., scient.	International Oceanographic Foundation
abbr., polym.	Institute of Fuel
abbr., space	initial operational flight
abbr., sport.	international Orienteering Federation
abbr., st.exch.	Income Opportunities Fund 1999
IoF abbr.
abbr., UN	initial overflight