| Abbreviation | Definition |
|---|---|
| EPL | External Processor Loop |
| EPOS | Ericssons Primitive Operating System |
| EPOW | Emergency Power Off Warning |
| EPS | Encapsulated PostScript |
| EPSF | Encapsulated PostScript Format |
| EPU | Electronic Processor Unit |
| EPV | Extended Precision Vector |
| ER | Entity Relationship |
| ER | Escape Request |
| ERA | Extended Registry Attribute |
| ERD | Emergency Recovery Disk |
| ERD | Emergency Rescue Disk |
| ERD | Engineering Review Diagram |
| ERD | External Requirements Document |
| ERDS | Error Recording Data Set |
| EREP | Environmental Record Editing and Printing program |
| ERM | Enterprise Resource Management |
| EROS | Electronic Repository Operating System |
| ERP | Expensive Redundant Processing |
| ERS | Emergency Recovery System |