BTO
- B2 (disambiguation)
- BRENDA tissue ontology
- Bachman-Turner Overdrive (1973 album)
- Bachman-Turner Overdrive (1984 album)
- Bachman–Turner Overdrive
- Barium titanate
- Betchworth railway station
- Bhitaura railway station
- Bismuth titanate
- Boston Typewriter Orchestra
- Botopasi Airstrip
- British Trust for Ornithology
- Brussels Treaty Organisation
- Build to order
- Build to order (HDB)
- Rinconada Bikol language