| Abbreviation | Definition |
|---|---|
| IEM-BARCIS | Installation Equipment Management BAR Code Inventory System |
| IEMS | Installation Equipment Management System |
| IENC | Inland Electronic Navigational Charts |
| IEP | Independent Evaluation Plan |
| IEPR | Independent Expert Peer Review |
| IEPR | Independent External Peer Review |
| IER | Independent Evaluation Report |
| IER | Information Exchange Requirement |
| IER | Information Exchange Requirements |
| IERW | Initial Entry Rotary Wing |
| IES | Imagery Exploitation System |
| IES | Imagery Exploration System |
| IES | Infantry Enhancement Suit |
| IESM | Indian Ex-Serviceman's Movement |
| IES-R | Impact of Events Scale - Revised |
| IESS | Imagery Exploitation Support System |
| IET | Independent Evaluation Teams |
| IET | Information Engineering Technology |
| IET | Initial Entry Training |
| IETD | Interactive Electronic Technical Documentation |