| Abbreviation | Definition |
|---|---|
| IPUM | International PolyWorks User Meeting |
| IQEC | International Quantum Electronics Conference |
| IRBC | International Rice Blast Conference |
| IRCC | International Roof Coatings Conference |
| IRCO | International Rubber Conference Organisation |
| IRDC | International Retail Design Conference |
| IRDC | International Roguelike Developers Conference |
| IRDC | International Roguelike Development Conference |
| IREC | Industrial Relations in Europe Conference |
| IREC | International Renewable Energy Conference |
| IRFC | International Rail Freight Conference |
| IRIC | International Reliability Innovations Conference |
| IRMC | International Risk Management Conference |
| IRMC | Iris Rotating Machine Conference |
| IRMM | International Conference on Infra-Red and Millimeter Waves |
| IROS | IEEE/RSJ (Institute of Electrical and Electronics Engineers/Robotics Society of Japan) International Workshop on Intelligent Robots and Systems |
| IRPC | International Refining and Petrochemical Conference |
| IRPS | International Reliability Physics Symposium |
| IRRC | Interdisciplinary Research Regional Conference |
| IRSC | International Remote Sensing Conference |