| Abbreviation | Definition |
|---|---|
| ICDR | Incremental Critical Design Review |
| ICDU | Inertial Coupling Data Unit |
| ICE | Input Control Element |
| ICE | Instrument Checkout Equipment |
| ICE | Instrument/Communication Equipment |
| ICF | Interface Control Function |
| ICG | In-Flight Coverall Garment |
| ICH | InterCHanger |
| ICIO | Interim Cargo Integration Operations |
| ICMO | Integrated Configuration Management Office |
| ICMS | Indirect Cost Management System |
| ICMS | Integrated Configuration Management System |
| ICMS | Intercom Master Station |
| ICMT | Intercontract Material Transfer |
| ICO | Integrated Checkout |
| ICOM | InterCOMmunications |
| ICON | International Circle Of Online Noranians |
| ICOS | Improved Crew Optical Sight |
| ICOU | Inertial Coupling Data Unit |
| ICP | ICS (Interpretive Computer Simulator) Control Program |