| Abbreviation | Definition |
|---|---|
| IES | Illuminating Engineering Society |
| IES | Industrial Electronics Society |
| IES | Institution of Engineers Singapore |
| IES | Integrated Electrical Services |
| IES | Interstate Electronic Systems |
| IESA | India Electronics and Semiconductor Association |
| IESCA | Interactive Electronic Serials Cataloging Aid |
| IESD | Internal Electro-Static Discharge |
| IESI | Integrated Electronic Standby Instrument |
| IESNA | Illuminating Engineering Society of North America |
| IESS | Integrated Electronic Security System |
| IESS | Integrated Electronic Security Systems |
| IESS | Integrated Electronic Solutions Security |
| IET | Integrated Electric Transmission |
| IET | Interline Electronic Ticketing |
| IETC | Innovative Electrical Testing Construction |
| IETE | Institute of Electronics and Telecommunication Engineers |
| IETM | Integrated Electronic Technical Manual |
| IETM | Interactive electronic technical manuals |
| IETM | Interactive Electronic Training Manual |