| Abbreviation | Definition |
|---|---|
| ITCU | Intercontainer |
| ITCX | International Technologies Corporation |
| ITDX | SULCOM |
| ITDX | SULCOM Incorporated |
| ITEU | Compagnia Italiana Investimenti Alternativi |
| ITFX | Infinity Transportation |
| ITGX | ITG Inc. |
| ITGX | ITG Incorporated |
| ITIU | International Transchem |
| ITIU | International Transchem Incorporated |
| ITIX | Intermodal Technologies |
| ITIX | Intermodal Technologies Incorporated |
| ITKU | Intertank |
| ITKU | Intertank Limiteda |
| ITLU | Itel Containers International Corporation |
| ITLU | Itel Containers International Corporation (Seaco) |
| ITLX | GE Rail Services Corporation |
| ITLX | General Electric Railcar Services Corporation |
| ITMZ | Indiana Transportation Museum |
| ITRC | Iowa Terminal Railroad Company, Charles City Division |