| CIRAS | Campionato Italiano Rally Auto Storiche 
| Others |
| CIRAS | Center for Industrial Research and Service
| Others |
| CIRAS | Combat Integrated Releasable Armor System
| Others |
| CIRAS | Combat Integrated Resealable Arse Shield
| Others |
| CIRAS | Confidential Incident Reporting & Analysis System
| Others |
| CIRAS | Confidential Incident Reporting and Analysis System
| Others |
| CIRAS | Crime Information Reporting and Analysis System
| Others |
| CIRAS | Croatian International Rhinosurgical Advanced School
| Others |