We have used the Keck Adaptive Optics system to observe galaxies
at cosmological distances in order to study their evolution. With the
latest cameras we have obtained a sample of >200 galaxies with
approximately 50 milliarcsecond resolution and are able to resolve
bulges, close companions, stellar bars and other important
characteristics. I will discuss our earlier completed survey, our ongoing
efforts and future plans. If there is time, I will briefly describe
OSIRIS, which is the next Keck science instrument and is ideally suited
for galaxy observations as well as many other science targets.