| Abbreviation | Designation | |
|---|---|---|
| Ok | Okazjonalny (Polish) | train category |
| Ök | Örnsköldsvik C, Örnsköldsviks central (Swedish) | station code |
| O&K | Orenstein & Koppel, Orenstein & Koppel Aktiengesellschaft (German) | rolling stock manufacturer |
| Abbreviation | Designation | |
|---|---|---|
| Ok | Okazjonalny (Polish) | train category |
| Ök | Örnsköldsvik C, Örnsköldsviks central (Swedish) | station code |
| O&K | Orenstein & Koppel, Orenstein & Koppel Aktiengesellschaft (German) | rolling stock manufacturer |