| Acronym | Meaning |
| ICC | Interstate Commerce Commission |
| ICCB | Integrated Change Control Board |
| ICCP | Interface Coordination And Control Procedure |
| ICD | Interface Control Document |
| ICDR | Incremental Critical Design Review |
| ICDU | Inertial CouPling Data Unit |
| ICE | Input Control Element |
| ICF | Interface Control Function |
| ICG | In-Flight Coverall Garment |
| ICH | Interchanger |
| ICIO | Interim Cargo Integration Operations |
| ICMO | Integrated Configuration Ianagement Office |
| ICMS | Indirect Cost Management SYstem |
| ICMT | Intercontract Material Transfer |
| ICO | Integrated Checkout |
| ICOS | Improved Crew Optical Sight |
| ICOU | Inertial Coupling Data Unit |
| ICP | ICS Control Program |
| ICR | Instruction Change Request |
| ICT | Influence Coefficient Tests |
| ICTC | Interface Control Tool Ing |
| ICW | Interrupted Continuous Wave |
| ICWG | Interface Control Working Group |
| ID | Identification |
| IDA | Interface Display Assembly |
| IDB | Lnsuit Drink Bag |
| IDC | IMBLMS Digital Computer |
| IDC | Integrated Displays And Controls |
| IDC | InterfaceDocumentControl |
| IDCA | Inverter Distribution And Control Assembly |
| IDD | Interface Definition Document(s) |
| IDE | Initial Design Evaluation |
| IDENTIFICAT | Identification Data |
| IDG | Integrated Drive Generator |
| IDI | InstrumentationDataItems |
| IDMM | Intermediate And Depot Maintenance Manual |
| IDO | InterdivisionalOperations |
| IDP | Integrated DataProcessor |
| IDR | Initial Design Review |
| IDR | InterimDiscrepancyReport |
| IDR | IntermediateDesignReview |
| IDRD | Information Definition Requirements Document |
| IDRD | Internal Data Requirement Description |
| IDS | Interface Data Sheet |
| IDS | Item Description Sheet |
| IDSD | Institutional Data System Division (JSC) |
| IDSO | Interdivisional Sales Order |
| IDT | I-load Data Tape |
| IDTA | Interdivisional Technical Agreement |
| IDU | Interface Demonstration Unit |