The Bulge of M31
  Bulges are not just elliptical subgalaxies situated in the centers of large
spirals. It might seem that way from their ages and chemistry, but bulge
kinematics have been known to be different since the first long slit spectra
were obtained. M31 presents the best opportunity to investigate all the issues
of the stellar populations of bulges. This review collects the array of probing
data that has been accumulated in the last decade. But the intriguing question
`how did it form like this ?' remains.
