| Acronym | Definition |
|---|
| IRG➣Iranian Revolutionary Guard |
| IRG➣International Resources Group |
| IRG➣Independent Regulators Group (EU) |
| IRG➣Informatics Research Group (various locations) |
| IRG➣Immunology Research Group (University of Calgary) |
| IRG➣International Research Group (various organizations) |
| IRG➣Immunoreactive Glucagon |
| IRG➣Insight Research Group (New York, NY) |
| IRG➣Internal Research Grant (higher education) |
| IRG➣Ghosthunters and the Incredibly Revolting Ghost |
| IRG➣Iraqi Republican Guard |
| IRG➣Interest Rate Guarantee |
| IRG➣Internet Resource Guide |
| IRG➣Inter Record Gap |
| IRG➣Integrated Review Group |
| IRG➣Initial Review Group |
| IRG➣International Research Grant |
| IRG➣Immediate Release Guidelines (World Customs Organization) |
| IRG➣Inter-Record Gap |
| IRG➣Interactive Research Group |
| IRG➣International Rice Genebank |
| IRG➣Imaging Research Group |
| IRG➣Impôt Sur Le Revenu Global (French: Income Tax Global) |
| IRG➣Insurance Research Group |
| IRG➣Internationale des Résistants À La Guerre (French: War Resisters International) |
| IRG➣Image Resource Group (Columbia, SC) |
| IRG➣Infinity Resource Group (Berwyn, PA) |
| IRG➣Insurance Rating Group |
| IRG➣Innovative Resources Group, Inc. (Saratoga Springs, NY) |
| IRG➣Incident Response Geographic Information System (California) |
| IRG➣Idea Resource Group |
| IRG➣Information Routing Group |
| IRG➣Interagency Review Group on Nuclear Waste Management |
| IRG➣Interdepartmental Regional Group |
| IRG➣Inertial Rate Gyro |