FIR
FIR stands for:
- Fédération Internationale des Résistants , international umbrella organization of associations of anti-fascist resistance fighters
 - Federazione Italiana Rugby , an Italian rugby federation
 - Far infrared, part of infrared radiation
 - Finite Impulse Response , a digital filter used in signal processing, see Filters with Finite Impulse Response
 - Final Investment Recommendation , term from the M&A area
 - FIR (association) , association at RWTH Aachen University, formerly research institute for rationalization
 - FIR (rim manufacturer) , Italian manufacturer of bicycle rims
 - Company reinsurance as a way of implementing company pension schemes, see reinsurance
 - Flight Information Region , information area for air traffic control in aviation, see flight information area
 - Freight Train Interregio , national, supra-regional freight train for single wagon traffic
 - Fairway in Regulation , a term used in golf, see Glossary of Golf Terms # Fairway in Regulation
 - Fast Infrared , a communication interface based on infrared radiation, see Infrared Data Association (IrDA)
 - Research institute for raw materials of the experimental and educational institute for brewery
 - First Line Air (ICAO code), former Sierra Leonean airline
 
fir stands for:
- Firan (language) (ISO-639-3 code), one of the Plateau languages in Plateau (Nigeria) , Nigeria
 
See also:
- List of all Wikipedia articles with titles starting with Fir
 - List of all Wikipedia articles whose title includes Fir