There was a time—and it’s actually not that long ago—when irrigation
systems were turned on and off by hand. For those who have come into the
business since then, it might be as difficult to imagine as silent
movies, telegrams and computers the size of a gymnasium. But in the age
of smart phones, 3-D movies, and tablet computers millions of times more
powerful than those gym-sized monsters, irrigation controllers have
made similar leaps.