| Acronym | Definition |
|---|
| IDEX➣International Defence Exhibition (Abu Dhabi, UAE) |
| IDEX➣Identifier of Explorer |
| IDEX➣International Development Exchange |
| IDEX➣Indiana Data Exchange (initiative) |
| IDEX➣Indian Network for Development Exchange |
| IDEX➣Innovation, Diversity and Excellence |
| IDEX➣Imagery Data Exploitation System |
| IDEX➣Imagery Digital Exploitation (system) |