  Actually there exist 218 stars with measured phase curves of the longitudinal
(effective) magnetic field B_e. In that group 172 objects are classified as
magnetic chemically peculiar stars (mCP). Remaining objects are stars of
various spectral types, from the most massive hot Of? supergiants to low mass
red dwarfs and stars with planets. This paper aims to review briefly properties
of the observed magnetic field in various types of stars.
