BNA
- BNA Records
- Bahrain News Agency
- Bakhtar News Agency
- Banco de la Nación Argentina
- Basle Nomina Anatomica
- Belga News Agency
- Bridged nucleic acid
- British Naturalists' Association
- British Neuroscience Association
- British Newspaper Archive
- British North America
- British North America Acts
- Bulgarian National Alliance
- Bureau of National Affairs
- Burma National Army
- Burnage railway station
- Nashville International Airport
- National Bank of Angola