| Abbreviation | Definition |
|---|---|
| IAPS | International Association Of Pastel Societies |
| IAPS | International Association Of Physics Students |
| IAQ | International Association Of Quidditch |
| IARC | International Agency for Research on Cancer |
| IARC | International Association of Reality Communication |
| IARCS | Indian Association for Research in Computing Science |
| IARE | International Association of Reservation Executives |
| IARFC | International Association of Registered Financial Consultants |
| IARS | International Anesthesia Research Society |
| IART | International Association of Rebreather Trainers |
| IARW | International Association of Refrigerated Warehouses |
| IAS | International Association of Sufism |
| IASA | International Association of Software Architects |
| IASA | Israel Arts and Science Academy |
| IASCA | International Auto Sound Challenge Association |
| IASIS | Institute for Advanced Study in the Integrative Sciences |
| IASM | International Association for Sport Management |
| IASM | International Association of Structural Movers |
| IASSA | International Arctic Social Sciences Association |
| IAS-USA | International Antiviral SocietyUSA |