| Acronym | Definition |
|---|
| ERU | Emergency Response Unit (Special Irish Police Unit) |
| ERU | Engineering Research Unit (University of Moratuwa; Sri Lanka) |
| ERU | Emission Reduction Unit |
| ERU | Equivalent Residential Units |
| ERU | Engineering Release Unit |
| ERU | Error Return Address Update |
| ERU | Emergency Recovery Utility |
| ERU | Equipment Replacement Unit |
| ERU | Eskie Rescuers United (Cedar Rapids, IA American Eskimo dog rescue) |
| ERU | Equilibrium Rate of Unemployment (economics) |
| ERU | Emergency Recovery Utility (Microsoft) |
| ERU | Event Request Unit (Infineon Technologies) |
| ERU | External Relations Unit (Australia) |
| ERU | Energy Research Unit (UK) |
| ERU | Equine Recurrent Uveitis |
| ERU | Emergency Relief Unit |
| ERU | Empresa de Renovación Urbana (Colombia) |
| ERU | Ejector Release Unit |
| ERU | Earth-Rate Unit |
| ERU | Emergency Recovery Unit |
| ERU | Edmonton Rugby Union |
| ERU | Eagle Rock Underground |
| ERU | Equipment Replaceable Unit |
| ERU | Estimated Residential Unit |