| IRG | Ignite Restaurant Group 
| Others |
| IRG | Immediate Release Granules
| Others |
| IRG | Imperial Racing Green
| Others |
| IRG | Implementation Review Group
| Others |
| IRG | Independent Reassessment Group
| Others |
| IRG | Independent Regulators Group
| Others |
| IRG | Independent Researchers Group
| Others |
| IRG | Individual Registered Girl
| Others |
| IRG | Individual Route Guidance
| Others |
| IRG | Industrial Realty Group
| Others |
| IRG | Industry Retail Group
| Others |
| IRG | Inertial Rate Gyroscope
| Others |
| IRG | Infiniti Retail Group
| Others |
| IRG | Inner Roll Gimbal
| Others |
| IRG | Integrated Resources Group
| Others |
| IRG | Integrated Review Groups
| Others |
| IRG | Integrity Rehab Group
| Others |
| IRG | Intelligent Robotics Group
| Others |
| IRG | Intensive Rotational Grazing
| Others |
| IRG | Inter Record Gap
| Others |
| IRG | Interest Rate Guarantee
| Others |
| IRG | Intergovernmental Reference Guide
| Others |
| IRG | Interior Resource Group
| Others |
| IRG | International Realty Group
| Others |
| IRG | International Repeater Group
| Others |
| IRG | International Resource Group
| Others |
| IRG | International Resources Group
| Others |
| IRG | International Risk Group
| Others |
| IRG | Internationally Recognised Government
| Others |
| IRG | Internet Research Group
| Others |
| IRG | Internet Resource Group
| Others |
| IRG | Internet Resource Guide
| Others |
| IRG | Iraq Republic Guard
| Others |
| IRG | IRGIgnite Restaurant Group
| Others |
| IRG | Islamic Resource Group
| Others |
| IRG | Islamic Resource Groups
| Others |
| IRG | itial Review Group
| Others |
| IRG | Lockhart Rivers, Queensland, Australia
| Others |