| Acronym | Definition |
|---|
| IIRG➣International Information Retrieval Guild |
| IIRG➣Institutional Investor Research Group (various locations) |
| IIRG➣Institute for International Research in Glass (Sunderland, England, UK) |
| IIRG➣Interface Interest and Research Group (Indiana University) |
| IIRG➣Insurance Rating Group (insurance) |