  Since the discovery that the ratio of inclusive charged lepton (per-nucleon)
cross sections from a nucleus A to the deuteron is not unity - even in deep
inelastic scattering kinematics - a great deal of experimental and theoretical
effort has gone into understanding the phenomenon. The EMC effect, as it is now
known, shows that even in the most extreme kinematic conditions the effects of
the nucleon being bound in a nucleus can not be ignored. In this paper we
collect the most precise data available for various nuclear to deuteron ratios,
as well as provide a commentary on the current status of the theoretical
understanding of this thirty year old effect.
