B0

B0 may refer to:
 * B0, a net magnetisation vector in medical imaging
 * La Compagnie, a French airline (IATA code B0)
 * Neutral B meson (B0)
 * Pininfarina B0, an electric car
 * B0, an ISO 216 paper size
 * B-0, the original name for the FLOW-MATIC data processing language
 * B0 star, a subclass of B-class stars