B21
Introduction '''B21''' may refer to:
Transportation * B21 (New York City bus), serving Brooklyn, New York City* BSA B21 (1937–1939), a British motorcycle made by Birmingham Small Arms Company, Birmingham, England* Kepong–Selayang Highway (Selangor state route B21), Malaysia* Leyland B21 (1979–1985), a bus chassis manufactured by Leyland* Volvo Redblock Engine, an automotive engine* A sports car built by Chevron Cars Ltd
Other uses * B21 (band), a British bhangra group* B-21 (machine), a cypher machine invented by Boris Hagelin* HLA-B21, an HLA - B serotype* Northrop Grumman B-21 Raider, an American stealth bomber* Boron-21 (B-21 or 21B), an isotope of boron
See also * ''Must B 21'', a 2003 album by American singer will.i.am* North American XB-21, an experimental bomber aircraft developed in the late 1930s* 21B (disambiguation)