| Acronym | Definition |
|---|
| EIU | Economist Intelligence Unit |
| EIU | Eastern Illinois University |
| EIU | Even If Used |
| EIU | Effective Interventions Unit (Scotland, UK) |
| EIU | Experimental Interaction Unit |
| EIU | Engine Interface Unit |
| EIU | Ethernet Interface Unit |
| EIU | Electronic Interface Unit |
| EIU | External Interface Unit (radar systems) |
| EIU | Extension In-Use (Telecommunications Industry Association Standards and Technology Department) |
| EIU | Enterprise Information Unification |
| EIU | Energy Information Strategies for Unregulated Markets |
| EIU | Elevator Inspectors Unit (gaming clan) |
| EIU | European International University |