| Acronym | Definition |
|---|
| CIRIS➣Completely Integrated Reference Instrumentation System |
| CIRIS➣California Inter-Regional Intermodal System (transportation) |
| CIRIS➣Critical Infrastructure Response Information System (New York) |
| CIRIS➣Consolidated Intelligence Resources Information System (US CIA) |
| CIRIS➣Central Inertial Reference Instrumentation System |