| Abbreviation | Definition |
|---|---|
| IET | Information Engineering Technology |
| IEU | Idiot End User |
| IFC | Ignore File Check |
| IFF | Interchange File Format |
| IFF | Interchangeable File Format |
| IFIP | International Federation of Information Processing |
| IFIS | Integrated Functional Imaging System |
| IFL | Image Format Library |
| IFS | Interchange File Separator |
| IFS | InterFrame Space |
| IG | Instance Generator |
| IGAF | International General Aviation Forum |
| IGES | Initial Graphics Exchange Specification |
| IGES | International Graphics Exchange Standard |
| IGI | International General Insurance |
| IGP | Industrial General Permit |
| IGP | Integrated Graphics Processor |
| IGPA | International General Produce Association |
| IGPD | Inspector General Practice Direction |
| IGS | Interchange Group Separator |