  In this paper, we study harmonic mappings by using the shear construction,
introduced by Clunie and Sheil-Small in 1984. We consider two classes of
conformal mappings, each of which maps the unit disk D univalently onto a
domain which is convex in the horizontal direction, and shear these mappings
with suitable dilatations \omega. Mappings of the first class map the unit disk
D onto four-slit domains and mappings of the second class take D onto regular
n-gons. In addition, we discuss the minimal surfaces associated with such
harmonic mappings. Furthermore, illustrations of mappings and associated
minimal surfaces are given by using Mathematica.
