| Acronym | Definition |
|---|
| RAIS | Refugee Assistance Information System (UN High Commissioner for Refugees) |
| RAIS | Risk Assessment Information System |
| RAIS | Rescate Ancestral Indígena Salvadoreño (Spanish: Salvadoran Indigenous Ancestral Rescue) |
| RAIS | Ram Air Intake System (motor vehicles) |
| RAIS | Remote Airport Information Service |
| RAIS | Relocation Automated Information System |
| RAIS | Retail Access Information System |
