| Abbreviation | Definition |
|---|---|
| EMI | Express Mail International |
| EMMS | Express Mail Military Service |
| EMRS | Electronic Marketing Reporting System |
| EMS | Express Mail International Service |
| EPO | Entry Post Office |
| ER | Eritrea |
| ERMC | Eastern Region Mail Container |
| ES | Spain |
| ESP | Electronic Sort Processor |
| ET | Ethiopia |
| ETOD | Estimated Time Of Delivery |
| FAM | Foreign Air Mail |
| FAST | Facility Access and Shipment Tracking |
| FCM | Filing, Cataloging, and Mailing |
| FCM | First Class mail |
| FCM | First-Class Mail |
| FEDEX | Federal Express |
| FEDSTRIP | FEDeral STandard Requisitioning and Issue Procedures |
| FHP | First Handling Pieces |
| FI | Finland |