| Acronym | Meaning |
| INTEROG | Interrogate |
| INTERPRETIV | Interpretive Co ' |
| INTF | Interface |
| INTG | Integration |
| INTLK | Interlock |
| INTR | Interior |
| INTRG | Interrogate |
| INTRLVR | Interleaver |
| INTRPT | Interrupt |
| INTV | Interim Hypersonics Test Article |
| INTVL | Interval |
| INTVLM | Intervalometer |
| INV | MGINVMGT Inventory Management |
| INV | Inverter |
| INVENTORY | CInventory Control Point |
| INVERTER | AsInverter Assembly |
| IOA | Input/Output Adapter |
| IOA | Input/Output Or Assembly |
| IOB | InPut/Output Box |
| IOB | InPut/Output Buffer |
| IOB | InPut/Output Buffer (if Bus |
| IOBPS | Input/Output Box And Peripheral Simulator |
| IOC | Indirect Operating Costs |
| IOC | Initial Operational Capability |
| IOC | Input/Output Controller |
| IOC | Joint Operations Center |
| IOCU | Input/Output Control Unit |
| IOE | Input/Output Error Log Table |
| IOF | Initial Operational Flight |
| IOP | Input/output Processor |
| IOPL | Integrated Open Problem List |
| IOQE | Input/Output C)ueue Element |
| IOSC | Integrated Operations Support Center |
| IP | Identification Of Position |
| IP | Igloo Pallet |
| IP | Impact Point |
| IP | Inertial Processing |
| IP | Instructor Pilot |
| IP | Instrumentation Payload |
| IP | InstruMentation PCM Data Bus |
| IP | Instrumentation/pulse Code Modulation Master Unit Data Bus |
| IP | Intermediate Pallet |
| IP | Intermediate Pressure |
| IPACS | Integrated Power And Attitude Control System |
| IPAD | Integrated Program For Aerospace Vehicle Design |
| IPB | Illuminated Push Button |
| IPB | Illustrated Parts Breakdown |
| IPC | Intermittent Positive Control |
| IPCL | Instrumentation Program And Component List |
| IPD | Information Processing Division |