| Abbreviation | Designation | |
|---|---|---|
| Bd | Bahndamm (German) | railway installation |
| SE-BD | Norrbotten, Norrbottens län (Swedish) | country code |
| BD | Bundesbahndirektion (1953–1993), Bundesbahndirektionen (DB) (German) Federal railway division | rail transport operations |
| BD | Berlin-Dresdener Eisenbahn-Gesellschaft (German) | railway company |