  Milgrom noticed the remarkable fact that the gravitational effect of dark
matter in galaxies only becomes important where accelerations are less than
about 10^{-8} cm s^{-2} ~ cH_0. This forms the basis for his Modified Newtonian
Dynamics (MOND), an alternative to particle dark matter. However, any
successful theory of galactic dynamics must account for Milgrom's Law. We show
how Milgrom's Law comes about in the Cold Dark Matter (CDM) theory of structure
formation.
