| Abbreviation | Definition |
|---|---|
| INCC | Inspiration Consolidated Copper Company |
| INCU | Intercontinental Transport |
| INCU | Intercontinental Transport, B. V. |
| INCX | INCO Limited |
| INCX | Inco Railway |
| INCZ | Intercontinental Transport |
| INCZ | InTransit Container, Inc. (formerly Intercontinental Transport, B. V.) |
| IND | Independent Subway System (New York City) |
| IND | Indianapolis Amtrak Station |
| INDU | Dorothea Marine Entreprise and Management |
| INDU | Industrial Ammonia (formerly Dorothea Marine Enterprise and Management) |
| INDX | Indelpro de CV |
| INDX | Indelpro, S. A. de C. V. |
| INDZ | Industrial Park Railroad |
| INFX | Infineum USA |
| INFZ | Infra-Metals Railroad |
| INGX | General Electric Railcar Services Corporation |
| INGX | Ingomar Packing (GE Rail Services Corporation) |
| INIJ | Interstate Industrial |
| INKU | Interpool |