B+ may refer to:
B+, a blood type B+ (grade), an academic grade B+ (photographer), an Irish photographer and filmmaker based in Los Angeles, California B+ tree, a data structure B+, a British home computer BBC Micro model B+, a British single-board computer Raspberry Pi model B+, the plus voltage of a Battery (electricity) or plus voltage of an electronic circuit B Plus, a Belgian non-profit organization B augmented triad, a chord made up of the notes B, D#, and F𝄪.