| Acronym | Definition |
|---|
| AIF | Annual Information Form |
| AIF | Apoptosis-Inducing Factor |
| AIF | Australian Imperial Force (name of the Australian Army WWI & WWII) |
| AIF | Accredited Investment Fiduciary |
| AIF | Agence Intergouvernementale de la Francophonie (French: Intergovernmental Agency for Francophony) |
| AIF | Application Integration Framework (Microsoft Dynamics) |
| AIF | Associated Industries of Florida |
| AIF | Anti-Iraqi Forces |
| AIF | Arterial Input Function (clinical diagnostics) |
| AIF | Audio Interchange Format (file extension) |
| AIF | Argument Interchange Format (abstract model) |
| AIF | Attorney in Fact |
| AIF | Airport Improvement Fee (Canada) |
| AIF | Agence Internationale de la Francophonie |
| AIF | Area Investment Framework (UK) |
| AIF | Atomic Industrial Forum |
| AIF | America India Foundation |
| AIF | Air Interface (telecommunications) |
| AIF | Association des Industries Ferroviaires (French: Railway Industry Association) |
| AIF | Animal Industry Foundation |
| AIF | Adult Interactive Fiction (game) |
| AIF | A-Interface (GSM Signal Interface Between BSC and MSC) |
| AIF | Authorised Investment Fund |
| AIF | Australian Infantry Force |
| AIF | Analog Interface |
| AIF | Alliance Internationale des Femmes (French) |
| AIF | Army Industrial Fund |
| AIF | Analytical Imaging Facility (Albert Einstein College of Medicine of Yeshiva University; Bronx, NY) |
| AIF | Automated Installation Intelligence File |
| AIF | Automated Intelligence File |
| AIF | Assured Isolation Facility |
| AIF | Association des Industriels de France (French: Manufacturers' Association of France) |
| AIF | Atheists in Foxholes |
| AIF | Airborne, Inhabited, Fighter (military aviation) |
| AIF | Association of Inter Church Families (Ireland) |
| AIF | Association des Ingénieurs Forestiers (French: Association of Forest Engineers) |
| AIF | All in Fee |
| AIF | Automated Installation File |
| AIF | Agent Interoperability Facility |
| AIF | Alternative Investments Forum |
| AIF | Ariya Imperial Force (gaming community) |
| AIF | Auxiliary Information File |
| AIF | Associate Injury Frequency |
| AIF | Air Intelligence Force |
| AIF | Atomic Industries Forum |
| AIF | Army Installation File (US Army) |
| AIF | Aides Individuelles à la Formation (French: Individual Aid for Training) |
| AIF | Atomic International Forum |
| AIF | AgInput Finance |
| AIF | Avionics Integrated Fuzing |
| AIF | Air Inlet Filter |
| AIF | Army Industrial File |
| AIF | Al-Imdaad Foundation (South Africa) |
| AIF | Advertising In Focus (Canada) |
| AIF | Argumenty I Fakty (Russian: Arguments and Facts; newspaper) |
| AIF | Auto Increment Field (computing) |
| AIF | aortic-iliac-femoral |
| AIF | Arbeitsgemeinschaft Industrieller Forschungsvereinigungen (German: Federation of Industrial Research Associations) |
| AIF | Alberta Ingenuity Fund (Canada) |
| AIF | ATHENA (Advanced Technologies for Interoperability of Heterogeneous Enterprise Networks and Their Applications) Interoperability Framework (EU) |