| REPORTING MARKS | COMPANY |
|---|---|
| APCU | American Presidents Line |
| APLU | American Presidents Line |
| ASIU | Alliance Shippers |
| AVLU | Allied Van Lines, Berger |
| BCIU | Bay Cities Leasing |
| BCJU | Bay Cities Leasing Container Pool |
| BCYU | Bay Cities Leasing |
| BNAU | Burlington Northern now Burlington Northern Santa Fe |
| BNXU | Burlington Northern Santa Fe |
| CDAU | Canadian Tire |
| CDNU | Caro-Trans International |
| CHAU | C. H. Robinson |
| CMCU | Crowley Maritime |
| CNRU | Canadian National |
| CPBU | Canadian Pacific |
| CPDU | Canadian Pacific, D&H |
| CPPU | Canadian Pacific |
| CRMU | Conrail Mercury |
| CRPU | Conrail, Interpool |
| CRQU | Conrail Quality, TransAmerica |
| CRTU | Conrail, Trac Leasing |
| CSKU | Consolidated Services Inc. (CSI) |
| CSXU | CSX Intermodal |
| CWIU | Con-Way Intermodal |
| DIIU | Dart |
| DRTU | Dart |
| EMPU | Equipment Management Pool |
| EMHU | Equipment Management Pool |
| EMUU | Equipment Management Pool |
| ECCU | East Carbon Development Co. |
| FFFU | Future Fast Freight Inc. |
| FLXU | Flexi-Van Leasing Inc. now Genstar Container Corp. |
| FSTU | United Parcel Service |
| GCEU | Genstar Container Corp. |
| GCPU | Genstar Container Corp. |
| GOCU | Interfresh now KLLM Transport Services |
| HUBU | HUB Group Inc. |
| HUNU | HUB Group Inc. |
| ICSU | TransAmerica ICS |
| IDIU | Interdom |
| IIIU | Iowa Interstate Railroad |
| INDU | Interpool |
| ITLU | Itel Containers International Corp. now Genstar Container Corp. |
| JBHU | J. B. Hunt |
| KCSU | Kansas City Southern |
| MDWU | Minnesota, Dakota, & Western Railway Co. |
| MRKU | Mark 7 Distribution |
| NCDU | North American Container System |
| NCEU | North American Container System, XTRA Lease |
| NCGU | North American Container System, Genstar Lease |
| NCHU | North American Container System |
| NCQU | North American Container System, Bay Cities Leasing |
| NCRU | North American Container System, TransAmerica Lease |
| NCUU | North American Container System, Greenbrier Lease |
| NECU | XTRA Inc. |
| NICU | NIC Leasing Inc. |
| NPRU | NPR Inc. |
| NSXU | North American Container System/Norfolk Southern |
| OPSU | Optimal/Schneider?, EMP |
| PATU | Pacer |
| RBCU | Rail Bridge |
| SFTU | Atchison, Topeka, & Santa Fe now Burlington Northern Santa Fe |
| SPDU | Southern Pacific |
| SPLU | Southern Pacific |
| STRU | Sea Star Line LLC |
| SUNU | Sunbury Transport |
| TAXU | Trac Lease Inc. |
| TCZU | Triple Crown Service |
| TLAU | Trail-Con Leasing Inc. |
| TNXU | Trans-X |
| TRBU | Trailer Bridge |
| TRLU | TransAmerica Leasing |
| TWEU | Vitran |
| UPRU | Union Pacific |
| UPSU | United Parcel Service |
| UPUU | Union Pacific |
| UVLU | United Van Lines |
| XCTU | XTRA Inc. |
| XTRU | XTRA Inc. |