| Abbreviation | Definition |
|---|---|
| AMIX | Apollo Metals (Railcar Leasing Specialists) |
| AMIX | Railcar Leasing Specialists Incorporated |
| AMIZ | American Marine Industries |
| AML | Alaska Marine Lines |
| AMLX | American Railcar |
| AMLX | American Railcar Company |
| AMMU | Ammann Italy |
| AMMU | Hyundai |
| AMMX | Amoco Minerals (Kentucky-Tennessee Clay) |
| AMMX | Kentucky-Tennessee Clay Company |
| AMNX | American Railcar Leasing Partners |
| AMOX | Amoco Oil (BP Products North America) |
| AMOX | Amoco Oil Company |
| AMOZ | American Oil |
| AMOZ | American Oil Company |
| AMPX | American Chemical Paint (GE Railcar Services Corporation) |
| AMPX | General Electric Railcar Services Corporation |
| AMR | Arcata and Mad River Railroad |
| AMRC | Amaravati Metro Rail Corporation |
| AMRU | Alaska Marine Lines |