GEOCLOCK 7.2 sunlight clock for DOS.  The
current sun position is displayed, and the
parts of the earth in sunlight and twilight
are highlighted, with local sunrise/set and
times around the world.  A windows version
(GCKWIN72.ZIP) is also available, and the
two versions are functionally and graphicly
similar.  Over 200 maps and a spinning
globe program are available.