| Abbreviation | Definition |
|---|---|
| ICE | Iowa, Chicago and Eastern Railroad |
| ICE | Iowa, Chicago, and Eastern Railroad Corporation (was IMRL) |
| ICEU | Inter-Continental Equipment |
| ICEU | Inter-Continental Equipment Incorporated |
| ICEZ | GATX Capital Corporation |
| ICG | Illinois Central Gulf Railroad (Canadian National Railway) |
| ICG | Illinois Central Railroad Company |
| ICGU | Illinois Central Gulf Railroad (Canadian National Railway) |
| ICGU | Illinois Central Railroad Company |
| ICGZ | Illinois Central Gulf Railroad (Canadian National Railway) |
| ICGZ | Illinois Central Railroad Company |
| ICHU | Ingetra |
| ICHU | Ingetra AG |
| ICIU | Intermodal Containers |
| ICIU | Intermodal Containers Incorporated |
| ICIX | ICI Americas |
| ICIX | ICI Americas Incorporated |
| ICIZ | Intermodal Containers |
| ICIZ | Intermodal Containers Incorporated |
| ICLU | International Container Leasing |