| Abbreviation | Definition |
|---|---|
| LMCU | World Container Leasing Incorporated |
| LMCX | All Minerals Corporation |
| LMIC | Lake Michigan and Indiana Railroad |
| LMIX | LORAM Maintenance of Way |
| LMIX | LORAM Maintenance of Way Incorporated |
| LMMR | Llanelli Mynydd Mawr Railway |
| LMRC | Lucknow Metro Rail Corporation |
| LMS | Locomotive Management Services |
| LMS | London, Midland, Scotland |
| LMS | London, Midland, & Scotland |
| LMSR | London, Midland, and Scottish Railway |
| LMSU | Longhorn Intermodal Supply |
| LMSX | Locomotive Management Services |
| LMT | Louisiana Midland Transport |
| LMTX | Chartrand's Tank Car Service Incorporated |
| LMTX | LMT Associates (Chartrand's Tank Car Service) |
| LMWX | L.M. Martini Grape Products (ConAgra) |
| LMWX | MHC Incorporated - Subsidiary of Conagra Incorporated |
| LN | CSX Transportation Incorporated |
| LN | Louisville And Nashville Railroad |