Computer simulations have played an important role in the elucidation of we
tting and interface unbinding phenomena. In particular, use of the Ising-la
ttice-gas model in a film geometry and subject to diverse surface and bulk
magnetic fields has permitted extensive Monte Carlo simulations to reveal n
ew features of the phase diagrams associated with these phenomena and to pr
ovoke new theoretical studies. The status of our knowledge about the nature
of wetting and interface-delocalization transitions which has resulted fro
m these Ising model simulations will be summarized.