| Abbreviation | Definition |
|---|---|
| KMRL | Kochi Metro Rail Limited |
| KMTU | Hyundai Merchant Marine |
| KMTU | Hyundai Merchant Marine (America) Incorporated |
| KMTX | Kinder Morgan |
| KMTZ | Hyundai Merchant Marine |
| KMTZ | Hyundai Merchant Marine (America) Incorporated |
| KMUX | Kershaw Manufacturing |
| KMUX | Kershaw Manufacturing Company |
| KNC | Kingcome Navigation |
| KNDX | KND Rail Services |
| KNDX | KND Rail Services Incorporated |
| KNLU | Nedlloyd Lines |
| KNOR | Klamath Northern Railway |
| KNOX | Knox Metals (Philips Metals) |
| KNOX | Knox Metals Corporation |
| KNR | Korean National Railroad |
| KNTU | Kanto Corporation |
| KNWA | Kanawha River Railroad |
| KO | Kansas and Oklahoma Railroad |
| KOAX | Coca-Cola |