B43 or b43 may refer to:
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Broadcom b43, linux wifi-driver and firmware
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Bundesstraße 43
''Bundesstraße'' (German for "federal highway"), abbreviated ''B'', is the denotation for German and Austrian national highways.
Germany
Germany's ''Bundesstraßen'' network has a total length of about 40,000 km.
German ''Bundesstraßen'' ...
, a German road
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B43 (New York City bus)
The Graham Avenue Line and Tompkins Avenue Line were two public transit lines in Brooklyn, New York City with the Graham Avenue Line running mainly along Graham Avenue and Manhattan Avenue and the Tompkins Avenue Line running mainly along Tompk ...
in Brooklyn
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B43 nuclear bomb
The B43 was a United States air-dropped variable yield thermonuclear weapon used by a wide variety of fighter bomber and bomber aircraft.
The B43 was developed from 1956 by Los Alamos National Laboratory, entering production in 1959. It entered se ...
* B43, an anti-
CD19
B-lymphocyte antigen CD19, also known as CD19 molecule ( Cluster of Differentiation 19), B-Lymphocyte Surface Antigen B4, T-Cell Surface Antigen Leu-12 and CVID3 is a transmembrane protein that in humans is encoded by the gene ''CD19''. In humans, ...
antibody
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B-43 Jetmaster, an aircraft
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