| IRSS | Implementation Review and Support System 
| Others |
| IRSS | Implementation Review Support System
| Others |
| IRSS | Indian Railway Stores Service
| Others |
| IRSS | Indian Railways Stores Service
| Others |
| IRSS | Indiana Registered Soil Scientists
| Others |
| IRSS | Indiana Registry of Soil Scientists
| Others |
| IRSS | Indonesia Road Survey Services
| Others |
| IRSS | Indonesia Roads Survey Services
| Others |
| IRSS | Information Resource Support System
| Others |
| IRSS | Infrared Simulation System
| Others |
| IRSS | Instant Resident Selection System
| Others |
| IRSS | Institute for Research in Social Science
| Others |
| IRSS | Integrated Remote Sensing Studio
| Others |
| IRSS | Intelligent Radiation Search System
| Others |
| IRSS | Intercontinental Recruitment and Support Services
| Others |
| IRSS | International Recruiting Staffing Solutions
| Others |
| IRSS | International Review for the Sociology of Sport
| Others |
| IRSS | International Review of Scottish Studies
| Others |
| IRSS | International Review of Social Sciences
| Others |
| IRSS | International Rough Set Society
| Others |
| IRSS | Intramural Research Seminar Series
| Others |