AAR
| Association of American Railroads | 3 |
ACL
| Atlantic Coast Line | 1 |
BSCX
| Bethlehem Steel Corporation | 2 |
CBQ
| Chicago Burlington & Quincy | 1 |
CNJ
| Central Rail Road of New Jersey | 1 |
CNW
| Chicago & Northwestern | 2 |
CSL
| Chicago Short Line Railway Company | 1 |
INLX
| Incoal Company | 5 |
LI
| Long Island Rail Road Company | 6 |
LIRR
| Long Island Railroad | 49 |
MKC
| McKeesport Connecting Railroad Company | 6 |
MTSX
| MAX TRANSPORTATION SERVICE | 6 |
NH
| New Haven | 4 |
NYCH
| New York Cross Harbor Railroad Terminal Corporation | 1 |
PRR
| Pennsylvania Railroad | 7 |