| Acronym | Definition |
|---|
| IREX➣International Research & Exchanges Board |
| IREX➣International Robot Exhibition (trade show; Japan) |
| IREX➣Internet Real Estate Express (Canada) |
| IREX➣Information Retrieval and Extraction Exercise (computer programming contest) |
| IREX➣Instrument Rating Exam (aviation; Australia) |
| IREX➣Inland Real Estate Exchange Corporation |
| IREX➣Indiana Real Estate Exchangors (Indianapolis, IN) |