| Abbreviation | Definition |
|---|---|
| AFIU | ABS Industrial Verification |
| AFIU | ABS Industrial Verification Incorporated |
| AFIX | FIXCOR Industries Incorporated |
| AFIZ | Agmark Foods |
| AFLR | Alabama and Florida Railroad |
| AFLR | Alabama and Florida Railroad Incorporated |
| AFPX | Allied Corporation Fibers and Plastics (Honeywell International) |
| AFPX | Allied-Signal Fibers |
| AFRX | AF Railway Industries |
| AFSX | Astoria |
| AFTX | American Freedom Train |
| AG | Abbeville-Grimes Railway (Bay Line Railroad) |
| AG | Galveston Railroad L. P. |
| AGC | Agra Cantt railway station |
| AGCR | Alamo Gulf Coast Railroad |
| AGCR | Alamo Gulf Coast Railroad Company |
| AGCX | Alberta Gas Chemicals (PROCOR) |
| AGCX | Procor Limited |
| AGEX | A. G. Pipe Lines (Nova Chemicals) |
| AGEX | A. G. Pipe Lines Incorporated |