| Acronym | Definition |
|---|
| EIO➣Emergency Information Officer (Canada) |
| EIO➣Extreme Input Output |
| EIO➣Execute Invalid Opcode |
| EIO➣Enhanced Input Output |
| EIO➣Error Input Output |
| EIO➣Executive Informational Overview |
| EIO➣Enhanced Input/Output |
| EIO➣Enterprise Inventory Optimization (software) |
| EIO➣Evermore Integrated Office |
| EIO➣Electronic in Out (software) |
| EIO➣Extended Interaction Oscillator |
| EIO➣Equipment Inventory Office |
| EIO➣Electronic Insurance Office |
| EIO➣Event Input Output |
| EIO➣Electronics Industry Outlook |
| EIO➣European International Orientation |
| EIO➣Ensemble Instrumental de l'Ouest (French: Instrumental Ensemble of West) |
| EIO➣Ethernet Input/Output (networks) |
| EIO➣Environmental Investment Organisation (UK) |