| Abbreviation | Definition |
|---|---|
| IPW | Individually Poly Wrapped |
| IPX/SPX | Internet work packet exchange/sequenced packet exchange (Novell) |
| IQOS | I Quit Ordinary Smoking |
| IRD | Infrared Rotary Drier |
| IRIS | Industry Resource Internet Supervision |
| IRIS | Intelligent Room Illumination Sensor |
| IRIS | International Repair Information System |
| IRM | Image Reject Mark |
| IRS | indoor residual spray |
| IRS | Indoor residual spraying |
| IS | Intrinsically Safe |
| ISAD | Integrated Starter Alternator Damper |
| iSAR | Instant Specific Absorption Rate |
| ISB | Inter-modal Steel Building |
| ISBU | Intermodal Steel Building Unit |
| ISC | Idle Speed Controller |
| ISC | Independent Speaker Chambers |
| ISC | Interactive Space Control |
| ISCU | Isle Station Control Unit |
| ISDN | Integrated System Development Network |