  The total specific angular momentum j of a galaxy disk is matched with that
of its dark matter halo, but the distributions are different, in that there is
a lack of both low- and high-j baryons with respect to the CDM predictions. I
illustrate how the probability density function PDF(j/j_mean) can inform us of
a galaxy's morphology and evolutionary history with a spanning set of examples
from present-day galaxies and a galaxy at z~1.5. The shape of PDF(j/j_mean) is
correlated with photometric morphology, with disk-dominated galaxies having
more symmetric PDF(j/j_mean) and bulge-dominated galaxies having a
strongly-skewed PDF(j/j_mean). Galaxies with bigger bulges have more
strongly-tailed PDF(j/j_mean), but disks of all sizes have a similar
PDF(j/j_mean). In future, PDF(j/j_mean) will be useful as a kinematic
decomposition tool.
