| Abbreviation | Definition |
|---|---|
| IOU | Input/Output Unit |
| IP | Identification of Position |
| IP | Igloo Pallet |
| IP | Impact Point |
| IP | Inertial Processing |
| IP | Instrument Panel |
| IP | Instrumentation Payload |
| IP | Instrumentation PCM (Pressurized Cargo Module) data bus |
| IP | Intermediate Pallet |
| IP | Intermediate Pressure |
| IP | International Partner |
| IPA | Instructions Per Second |
| IPA | Intergovernmental Personnel Action |
| IPA | IsoPropyl Alcohol |
| IPACS | Integrated Power and Attitude Control System |
| IPAD | Integrated Program for Aerospace Vehicle Design |
| IPB | Illuminated Push Button |
| IPC | Intermittent Positive Control |
| IPCL | Instrumentation Program and Component List |
| IPD | Information Processing Division |