| IRAD | Illinois Regional Archives Depositories 
| Others |
| IRAD | Illinois Regional Archives Depository
| Others |
| IRAD | Independent Research And Design
| Others |
| IRAD | Industry Research And Development
| Others |
| IRAD | Infinitely Redundant Administrative Documation
| Others |
| IRAD | Integrated Road Accident Database
| Others |
| IRAD | Interactive Radiology Review & Assessment
| Others |
| IRAD | Internal Research And Development
| Others |
| IRAD | International Registry of acute Aortic Dissections
| Others |
| IRAD | International Registry of Aortic Dissection
| Others |
| IRAD | Issue Resolution and Determination
| Others |