| Acronym | Definition |
|---|
| IRDG➣Interconnection Requirements for Distributed Generation (electricity) |
| IRDG➣Infrared and Raman Discussion Group (est. 1950; UK) |
| IRDG➣Industry Research and Development Group (Ireland) |
| IRDG➣Inter-Regional Deputies' Group (former Soviet political group; est. 1989) |