BTM
- BTM Antananarivo
- BTM Layout
- Ballarat Tramway Museum
- Before the Mourning
- Behind the Music
- Benefitive treasury measure
- Bert Mooney Airport
- Betraying the Martyrs
- Biot–Tolstoy–Medwin diffraction model
- Bis-tris methane
- Blocks That Matter
- Brisbane Tramway Museum
- Bristol Temple Meads railway station
- British Tabulating Machine Company
- Bromotrifluoromethane
- Bronx Terminal Market
- Bukit Timah Monkey Man
- Business Technology Management
- Business Transaction Management
- Huntingdon and Broad Top Mountain Railroad and Coal Company
- Mandailing language
- Martin AM Mauler
- Miles Copeland III
- RCS-4
- RCS-8