| IFA | Institut für Asienkunde | In German | → Area studies |
| IFA | Interuniversitäres Forschungsinstitut für Agrarbiotechnologie | In English | → Biotechnology → Agricultural sciences |
| IFA | In-Flight Analysis | In English | → Aeronautics, aircraft → Spaceflight engineering, astronautics |
| IFA | Interface Functional Analysis | In English | → Human-computer interaction |
| IFA | Impôt Forfaitaire Annuel | In French | → Taxes, duties |
| IFA | Internacia Fonetika Alfabeto = AFI | Alfabetul Fonetic Internaţional | In Romanian = LFE | Lizherenneg Fonetikel Etrebroadel | In Breton = МФА | Международната фонетична азбука | In Bulgarian = IPA | Internationales Phonetisches Alphabet | In Tosk = AFI | Alfabet fonètic internacional | In Catalan = IPA | International Phonetic Alphabet | In English = ΔΦΑ | Διεθνές Φωνητικό Αλφάβητο | In Greek = IPA | Internationales Phonetisches Alphabet | In German = API | Alphabet Phonétique International | In French = AFI | Alfabeto Fonético Internacional | In Spanish = AFI | Alfabeto Fonético Internacional | In Galician = NAF | Nazioarteko Alfabeto Fonetikoa | In Basque = IPA | Internationalt Phonetescht Alphabet | In Letzeburgesh = AFI | Alfabeto Fonetico Internazionale | In Italian = МФА | Международный фонетический алфавит | In Russian = AFI | Alfabeto Fonético Internacional | In Portuguese = AFI | Alfabet fonetic internacionau | In Occitan = AFE | Alfabet Fonetike Eternåcionå | In Walloon = IFA | Internationoal Fonetisch Alfabet | In Vlaams = AFN | Alfabeti Fonetik Ndërkombëtar | In Albanian |
In Esperanto | → Writing systems |
| IFA | Internationoal Fonetisch Alfabet = AFI, LFE, МФА, IPA, ΔΦΑ, API, NAF, AFE, AFN (look above) |
In Vlaams | → Writing systems |
| IFA | Imagerie Fonctionnelle Automatisée | In French | → Diagnostics |
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