  The status of stopping in heavy ion reactions is reviewed by comparing
available data in pp, pA and AA systems over the energy regime sqrt(s_NN) ~ 2.5
- 130 GeV/c. The data consist of average rapidity losses, anti-proton over
proton ratios, and net-baryon values at mid-rapidity. The overall features of
nuclear stopping are reasonbly well described by simple extrapolations of pp,
and pA collisions to AA
