| Abbreviation | Designation | |
|---|---|---|
| BB | Beförderungsbedingungen (German) | |
| BB | Bordbistro (German) | vehicle fleet |
| DE-BB | Brandenburg, Land Brandenburg (German) | country code |
| BB | Böblingen (German) | fare point / vehicle registration plate |
| Bb | Brobacka (Swedish) | station code |
| b.b | bahn.bonus (Prämienprogramm) (German) | offer / trademark |
| b.b | bahn.business (Geschäftskundenprogramm) (German) | offer / trademark |