| Abbreviation | Definition |
|---|---|
| IDRC | Improved Data Recording Capability |
| IDS | Internal Detection System |
| IDS | Intrusion Detection System |
| IDSW | Identification Switch |
| IEC | Interrupt Enable Current |
| IED | Improvised Explosive Device |
| IET0 | Interrupt Enable Timer Bit 0 |
| IET1 | Interrupt Enable Timer Bit 1 |
| IFCU | InterFace Control Unit |
| IFP | Iriver Flash Player |
| IFPA | Intel Front Panel Audio |
| IFSF | International Forecourt Standards Forum |
| IFSR | Instruction Fault Status Register |
| IGBT | Insulated Gate Bipolar Transistor |
| IH | Instrument Height |
| IHD | In Home Device |
| IHS | Integrated Heat Spreader |
| IID | Ignition Interlock Device |
| IID | Integrated Information Display |
| IIS | Integrated Interchip Sound |