| Abbreviation | Definition |
|---|---|
| ABB | Akron and Barberton Belt Railroad |
| ABB | Akron and Barberton Belt Railroad Company |
| ABBU | Atlantic Bulk Carriers Managment |
| ABBX | Abbott Laboratories |
| ABBX | Abbott Labs |
| ABC | Air Brakes And Chain |
| ABCK | Alaska British Columbia Transportation |
| ABCU | ABC Mobile Storage |
| ABCX | American Bitumuls (Tennessee Valley Authority) |
| ABEX | Abbey Chemical Corporation |
| ABFZ | ABF Freight Systems Incorporated |
| ABGX | American Black Granite |
| ABIX | Anheuser-Busch |
| ABIX | Anheuser-Busch Incorporated |
| ABL | Alameda Belt Line |
| ABLX | American Refrigerator Transit |
| ABM | Texas and Pacific Raiway (Missouri Pacific Railroad) |
| ABMX | Albers Brothers Milling |
| ABN | Alabama Northern Railway (Ashland Railway) |
| ABOX | American Rail Box Car (TTX) |