IOIS
| Acronym | Definition |
|---|---|
| IOIS | Integrated Offender Interventions Service (UK) |
| IOIS | Interorganizational Information System |
| IOIS | Idiopathic Orbital Inflamatory Syndrome (eye disease) |
| IOIS | Imaging of Intrinsic Signals |
| IOIS | Integrated Operational Intelligence System |
| IOIS | International Organization of Information Specialists |
| IOIS | Indian Oasis Intermediate School (Arizona) |