B1
- 1B (disambiguation)
- Alsace-Lorraine B 1
- Arecatannin B1
- B-1 cell
- B-1/B-2 Visa
- B-Line (Sydney)
- B01 (disambiguation)
- B1 (New York City bus)
- B1 (classification)
- B1 (file format)
- B1 Centauro
- B1 TV
- B1 type submarine
- BI (disambiguation)
- Ballade No. 1 (Chopin)
- Bananas in Pyjamas
- Boom XB-1 Baby Boom
- Bortle scale
- Bradykinin receptor B1
- Brasilsat B1
- C2 radio class
- Char B1
- Cinnamtannin B1
- Combretastatin B-1
- Common European Framework of Reference for Languages
- Finnish Steam Locomotive Class B1
- Fumonisin B1
- GCR Class 8C
- HMS B1
- ISO 216
- LNER Thompson Class B1
- Marussia B1
- NER Class B1
- Pennsylvania Railroad class B1
- Proanthocyanidin B1
- Rockwell B-1 Lancer
- Saturn B-1
- Steam locomotives of Ireland
- TCSEC
- USS B-1 (SS-10)
- Vitamin B1