| Abbreviation | Definition |
|---|---|
| WHLU | Wan Hai Lines Limited |
| WHMX | Miner Enterprises |
| WHN | Consolidated Rail Corporation |
| WHN | Wharton & Northern Railroad (Conrail) |
| WHOE | Walking Horse and Eastern Railroad |
| WHR | Welsh Highland Railway |
| WHRC | Windsor and Hantsport Railway |
| WHRC | Windsor and Hantsport Railway Company |
| WHRS | Welsh Highland Railway Society |
| WHRS | Wentworth House Rail Systems |
| WHSX | GE Rail Services |
| WHTX | ADM Milling |
| WHTX | ADM Milling Company |
| WHTZ | Riley Whittle (RWI Transportation) |
| WHTZ | Riley Whittle Incorporated (RWI Transportation) |
| WICT | Wisconsin and Calumet Railroad |
| WIF | West India Fruit and Steamship |
| WIGX | Wigeon Car |
| WIIX | Williamette Industries |
| WIIX | Williamette Industries Incorporated |