There are other less obvious examples of industries that have been and is now endangering their futures by improperly defining their purposes. I shall discuss some in detail later and analyze the kind of policies that lead to trouble. Right now it may help to show what a thoroughly customer-oriented management can do to keep a growth industry growing, even after the obvious opportunities have been exhausted; and here there are two examples that have been around for a long time. They are nylon and glass specifically, e.g. Dupont de Nemours & Company and Corning Glass Works.