| Acronym | Definition |
|---|
| IAG | Intelligent Application Gateway (Microsoft) |
| IAG | International Airlines Group (various locations) |
| IAG | Insurance Australia Group |
| IAG | Information, Advice and Guidance |
| IAG | International Association of Geodesy |
| IAG | International Assistance Group |
| IAG | Industrial Alliance Insurance and Financial Services, Inc. (Canada) |
| IAG | Interagency Agreement |
| IAG | Intelligent Application Gateway |
| IAG | Interagency Group |
| IAG | International Association of Geomorphologists |
| IAG | International Audio Group |
| IAG | Industry Advisory Group |
| IAG | Intel Architecture Group |
| IAG | International Association of Gerontology |
| IAG | It's All Good |
| IAG | Industry Action Group |
| IAG | Institute of Australian Geographers |
| IAG | Institut d'Administration et de Gestion |
| IAG | Iraq Assistance Group (US military command) |
| IAG | Investment Advisory Group |
| IAG | Intermedia Advertising Group |
| IAG | instruction address generation |
| IAG | Independent Assessment Group |
| IAG | Information Assurance Group |
| IAG | Industry-Academia-Government (collaboration; Japan) |
| IAG | Information Advisory Group |
| IAG | Interagency Advisory Group |
| IAG | Innovations in American Government (Competition) |
| IAG | InterAmerican Acquisition Group |
| IAG | I Am Gay |
| IAG | Innovation Asset Group (software company; Oregon) |
| IAG | Implementation and Advisory Group (Edmonton, AB, Canada) |
| IAG | International Auditing Guidelines |
| IAG | Interactive Application Generator |
| IAG | Institute of Agricultural Genetics (Hanoi, Vietnam) |
| IAG | Imagery Analysis Group |
| IAG | Institute of Animal Genetics |
| IAG | Interleaver Address Generator |
| IAG | Integrated Access Gateway (Telecommunications) |
| IAG | International Association of Gravity |
| IAG | isometric array grammar |
| IAG | Iraqi Advisory Group |
| IAG | Involuntary Asset Growth |
| IAG | Illinois Art Gallery |
| IAG | Incident Analysis Group |
| IAG | Internationale Arbeitsgemeinschaft der Berufsverbände Christlischer Arbeitnehmerinnen in der Hauswirtschaft (German: International Confederation of Professional Associations of Domestic Workers) |
| IAG | Inter-Industry Advisory Group |
| IAG | Inventor's Awareness Group |
| IAG | International ATM Gateway (Sprint) |
| IAG | Imran Abdul Group (Saudi Arabia) |