| Abbreviation | Definition |
|---|---|
| ILVS | In Line Vehicle Scheduling |
| ILVS | In Line Vehicle Sequencing |
| ILWU | International Longshoremen's and Warehousemen's Union |
| IM | Inner Marker |
| IMA | Integrated Motor Assist |
| IMAC | Integrated Motoring And Analysis Center |
| IMARS | Incident Management Analysis and Reporting System |
| IMAV | International Micro Air Vehicles |
| IMB | International Maritime Bureau |
| IMCO | Intergovernmental Maritime Consultative Organization |
| IMCT | Industry Manufacturing Construction Transportation |
| IMD | Individual Motor Drive |
| IMDGC | International Maritime Dangerous Goods Code |
| IMG | International Maintenance Group |
| IMIS | Integrated Marine Information System |
| IMM | International Mercantile Marine |
| IMS | Intermodal Management System |
| IMSBC | International Maritime Solid Bulk Cargoes |
| IMSS | Inter-Movement Support System |
| IMTP | International Mass Transportation Program |