| Abbreviation | Definition |
|---|---|
| DPMG | Deputy PostMaster General |
| DPO | Designated Post Office |
| DPO | Diplomatic Post Office |
| DPO | Discontinued Post Office |
| DSCF | Destination Sectional Center Facility |
| DSR | Direct Signature Required |
| DZ | Algeria |
| EAP | Employee Assistance Program |
| EAS | Executive and Administrative Schedule |
| EC | Ecuador |
| ECB | Engineering Change Board |
| ECRSS | Enhanced Carrier Route Saturation Standard |
| EE | Estonia |
| EEO | Equal Employment Opportunity |
| EG | Egypt |
| EH | Western Sahara |
| EI/QWL | Employee Involvement/Quality of Work Life |
| EIS | Executive Information System |
| ELM | Employee and Labor Relations Manual |
| EMDIMS | Electronic Material Distribution and Inventory Management System |