| ICRS | I Can't Remember S**t 
| Others |
| ICRS | IERS Celestial Reference System
| Others |
| ICRS | Image Capture and Review System
| Others |
| ICRS | Immaculate Conception Regional School
| Others |
| ICRS | Inner City Renewal Society
| Others |
| ICRS | Innovative Clinical Research Solutions
| Others |
| ICRS | Institute for Comparative and Regional Studies
| Others |
| ICRS | Institute of Corporate Responsibility and Sustainability
| Others |
| ICRS | Integrated Care Records Service
| Others |
| ICRS | Integrated Case Reporting System
| Others |
| ICRS | Integrated Crisis Response System
| Others |
| ICRS | Intelligent Crash Response System
| Others |
| ICRS | Intensive Community Rehabilitative Service
| Others |
| ICRS | International Cannabinoid Research Society
| Others |
| ICRS | International Cannabinoid Research Society's
| Others |
| ICRS | International Car Rental Show
| Others |
| ICRS | International Cartilage Repair Society
| Others |
| ICRS | International Celestial Reference System
| Others |
| ICRS | International Center for Regulatory Scholarship
| Others |
| ICRS | International Chemical Reference Substances
| Others |
| ICRS | International Christian Retail Show
| Others |
| ICRS | International Computer Refurbisher Summit
| Others |
| ICRS | International Conference on Resource Sustainability
| Others |
| ICRS | International Coral Reef Society
| Others |
| ICRS | International Coral Reef Symposium
| Others |
| ICRS | Intrastromal Corneal Ring Segment
| Others |
| ICRS | Intrastromal Corneal Ring Segments
| Others |
| ICRS | Iridium Cellular Roaming Service
| Others |