| Abbreviation | Definition |
|---|---|
| EBGR | Eastern Berks Gateway Railroad |
| EBPX | Empire Builder Private Cars |
| ECBR | East Cooper and Berkeley Railroad |
| ECBR | East Cooper and Berkeley Railroad Company |
| ECCX | Ethyl Canada |
| ECCX | Ethyl Canada Incorporated |
| ECDU | ECDC Environmental |
| ECDX | Edwin Cooper |
| ECDX | Ethyl Petroleum Additives Incorporated |
| ECGX | Alabama Power |
| ECGX | Alabama Power Company |
| ECIX | Erman Corporation |
| ECLX | ELM-Central Rail Leasing |
| ECML | East Coast Main Line |
| ECO | Ecorail |
| ECO | ECORAIL Incorporated |
| ECOX | Eco East |
| ECOZ | Ecorail |
| ECOZ | Ecorail Incorporated |
| ECPX | E.C.C. America Incorporated |