| Acronym | Definition |
|---|
| IRSA➣Interest Rate Swap Agreement (financial instrument) |
| IRSA➣Ibm Rational Software Architect |
| IRSA➣Indus River System Authority |
| IRSA➣International Rett Syndrome Association |
| IRSA➣Istituto di Ricerca Sulle Acque (Italian: Water Research Institute) |
| IRSA➣Indonesia Regional Science Association |
| IRSA➣Interest Rate Sensitive Asset |
| IRSA➣International Rural Sociology Association |
| IRSA➣International Radiosurgery Support Association |
| IRSA➣Intramural Recreational Sports Association (various locations) |
| IRSA➣Irish Research Staff Association (est. 2007) |
| IRSA➣Institute of Remote Sensing Application (China) |
| IRSA➣Lackfabrik Irmgard Sallinger GmbH (Deisenhausen, Germany) |
| IRSA➣Infrared Science Archives |
| IRSA➣Institution Régionale des Sourds et des Aveugles (French: Regional Institution for the Deaf and Blind) |
| IRSA➣Institut Royal des Sourds et Aveugles (Brussels school for deaf & blind) |
| IRSA➣Istituto Per Le Ricerche Di Storia Dell'arte (Italian: International Institute for Art Historical Research) |
| IRSA➣International Road Safety Academy Association (Netherlands; est. 2004) |
| IRSA➣International Retained Search Associates (employment recruiting; Mount Pleasant, SC) |
| IRSA➣Independent Railway Supervisors Association |
| IRSA➣Invercargill Returned Services' Association, Inc. (Southland, New Zealand, affiliated with Royal New Zealand Returned Services' Association Inc.) |