| Abbreviation | Definition |
|---|---|
| ERP | Equity Risk Premium |
| ERP | Essential Requirement for Productivity |
| ERP | Estimated Retail Price |
| ERP | European Recovery Programme |
| ERPC | Estimated Revenue Per Click |
| ERPS | Enterprise Resource Planning System |
| ERQ | Employer’s Requirements |
| ERQ | Employers Requirements |
| ERR | Employment Responsibilities And Rights |
| ERR | Engineering Research Report |
| ERR | Excess Relative Risk |
| ERS | Employee Reporting System |
| ERS | Experimental Resolution System |
| ERSP | Electronic Reservations System Provider |
| ERT | Emergency Response Team |
| ERT | Exhibits Round Table |
| ERTB | Employee Relations, Training, & Benefits |
| ERTC | Eastern Region Training Conference |
| ERTF | Establishment Review Task Force |
| ES | Enhanced Services |