| Abbreviation | Definition |
|---|---|
| ILD | Initial Launch Data |
| ILEA | International Law Enforcement Academy |
| ILIR | Independent Laboratory In house Research |
| ILMS | Improved Launcher Mechanical System |
| ILOC | Integrated Line of Communications |
| ILOC | Intermediate Location |
| ILOGS | Integrated Logistics System |
| ILP | International Logistics Program |
| ILR | Item Level Restrictions |
| ILRS | International Laser Ranging Service |
| ILS | Instrument Landing System |
| ILS | Integrated Logistic Support |
| ILS | Integrated Logistics Support |
| ILSC | Integrated Logistics Support Center |
| ILSC | Integrated Logistics Support Concept |
| ILSDP | International Logistics Supply Delivery Plan |
| ILSMRS | Integrated Logistics Support Milestone Reporting System |
| ILSMT | Integrated Logistics Support Management Team |
| ILSO | Integrated Logistics Support Organization |
| ILSP | Integrated Logistics Support Plan |