| Abbreviation | Definition |
|---|---|
| IC | Intercomputer Communication |
| IC | Interim Change |
| IC | Interior Communications |
| IC | Internal Combustion |
| IC | Ion Chamber |
| IC/ES | Intercommunication/Emergency Station |
| ICA | Integration Control Agreement |
| ICA | Item Change Analysis |
| ICAR | Investigation and Corrective Action Report |
| ICAT | Integrated Change Assessment Team |
| ICB | Interim Change Bulletin |
| ICB | Interrupt Control Block |
| ICBC | Imax Cargo Bay Camera |
| ICBC | Interagency Committee on Back Contamination |
| ICBM | Inter-Continental Ballistic Missile |
| ICC | Inter-Computer Communication |
| ICC | Interface Control Chart |
| ICCB | Integrated Change Control Board |
| ICCP | Interface Coordination and Control Procedure |
| ICD | Interface Control Drawing |