| ORR |
 |
Ohio Rail-Road Co. |
|
| ORy |
|
Ohio Railway Co. (The) |
|
| O&C |
|
Oregon & California Rail Road Co. |
|
| O&I |
|
Ohio and Indiana Railroad Co. |
|
| O&I |
|
Ohio and Indianapolis Railway Co. |
|
| O&LC |
|
Ogdensburg & Lake Champlain Railroad Co. |
|
| O&M |
|
Ogdensburg and Morristown Railroad Co. (The) |
|
| O&M |
|
Ohio & Michigan Railway Co. (The) |
|
| O&M |
|
Ohio and Mississippi Railway Co. |
|
| O&NW |
|
Orange and NorthWestern Railroad Co. (The) |
|
| O&NY |
|
Ottawa & New York Railway Co. (The) |
|
| O&P |
|
Ohio and Pennsylvania Railroad Co. |
|
| O&R |
|
Oswego and Rome Rail Road Co. |
|
| O&S |
|
Olean and Salamanca Railroad Co. (The) |
|
| O&SL |
|
Ontonagon and State Line Rail Road Co. |
|
| O&SW |
|
Omaha & SouthWestern Railroad Co. |
|
| O&W |
|
Ontario & Western Railway Co. |
|
| O&WT |
|
Oregon & Washington Territory Railroad Co. |
|
| O&WV |
|
Ohio and West Virginia Railway Co. (The) |
|
| OB&W |
|
Olean, Bradford and Warren Rail Road Co. (The) |
|
| OC |
|
Oil Creek Railroad Co. |
|
| OC |
|
Orange County Railroad Co. |
|
| OC |
|
Oregon Central Rail Road Co. |
|
| OC&AR |
|
Oil Creek and Allegheny River Railway Co. (The) |
|
| OC&C |
|
Oil City and Chicago Railroad Co. (The) |
|
| OC&E |
|
Oregon, California & Eastern Railway Co. |
|
| OC&T |
|
Oil Creek and Titusville Mining and Transportation Co. |
|
| OC&T |
|
Oklahoma City & Texas Railroad Co. |
|
| OFW&C |
|
Ohio, Fort Wayne and Chicago Railway Co. (The) |
|
| OK&M |
|
Oklahoma, Kansas & Missouri Railway Co. |
|
| OK&T |
|
Oklahoma, Kansas & Texas Railroad Co. |
|
| ON |
|
Ontario Northland Railway Co. |
|
| ONM&P |
|
Oklahoma, New Mexico & Pacific Railway Co. |
|
| OP |
|
Ontario Pacific Railway Co. (The) |
|
| OP&E |
|
Oregon, Pacific & Eastern Railway Co. |
|
| OP&J |
|
Orleans, Paoli and Jasper Railway Co. (The) |
|
| OR&C |
|
Ohio River and Charleston Railway Co. of Virginia |
|
| OR&C |
|
Ohio River and Charleston Railway Co. of South Carolina |
|
| OR&C |
|
Ohio River and Charleston Railway Co. of North Carolina |
|
| OR&C |
|
Ohio River and Charleston Railway Co. of Tennessee |
|
| OR&N |
|
Oregon Railroad & Navigation Co. |
|
| OS |
|
Ontario Southern Railroad Co. |
|
| OTV |
|
Otter Tail Valley Railroad Co. |
|
| OUR&D |
|
Ogden Union Railway & Depot Co. |
|
| OV&J |
|
Ohio Valley and Junction Railway Co. (The) |
|
| OWB&FLS |
|
Orleans, West Baden and French Lick Springs Railway Co. |
|
| OWR&N |
|
Oregon-Washington Railroad & Navigation Co. |
|
Logos are the property of their respective Companies.
Les logos sont la propriété de leurs Sociétés respectives.