  Our knowledge on the central components of disk galaxies has grown
substantially in the past few decades, particularly so in the last. This
frantic activity and the complexity of the subject promote confusion in the
community. In these notes, I discuss the concept of galactic bulge and its
different flavors. I also address fundamental scaling relations and the
bulge-elliptical galaxy connection, their central black holes and formation
models. In particular, I aim at conveying three important notions: (i):
box/peanuts are just the inner parts of bars; (ii): the physical reality of two
different families of bulges is evident; and (iii): at the high mass end, at
least, classical bulges are not just scaled down ellipticals surrounded by
disks.
