- a unit of magnetic moment, used in measuring the magnetic moment of atomic and subatomic particles.
- a unit of magnetic moment equal to eh /4π m where e and m are the charge and mass of an electron and h is the Planck constant. It has the value 9.274 096 × 10 –24 joule per tesla
- a similar unit equal to β m / M where M is the mass of the proton
