Viso may refer to:
E. J. Viso (born 1985), Venezuelan racing driver Monte Viso, mountain in Italy El Viso, city in Spain
Computing Virtual ISO, i.e. constructed in memory from a bunch of files on the host for a virtual machine running over it. A VISO is just the recipe describing how to go about this using a syntax vaguely similar to mkisofs and genisoimage.
See also Vișeu, a river in Romania