| IRSC | Indian River State College 
| Others |
| IRSC | Indian River State College's
| Others |
| IRSC | Institute for Regional Studies of the Californias
| Others |
| IRSC | International and Regional Standardization Committee
| Others |
| IRSC | International Radiation Safety Consultants
| Others |
| IRSC | International Radiation Safety Consulting
| Others |
| IRSC | International Recording Standard Code
| Others |
| IRSC | International Remote Sensing Conference
| Others |
| IRSC | International Road Safety Centre
| Others |
| IRSC | Internet Resources for Special Children
| Others |
| IRSC | Interstate Roof Systems Consultants
| Others |
| IRSC | Irish Red Setter Club
| Others |