B0

B0 may refer to:

• {{not a typo|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