The document discusses the concept of a "holon" which is a component of a system that is both a whole and part. In retail, key holons include areas like merchandising, advertising, product management, and point-of-sale systems. An effective retailer ensures each holon functions well individually and together to create a successful customer experience. In contrast, an "unstacked" retailer lacks integrated holons and coordination among them to attract customers and boost employee productivity. Building a "stacked retail enterprise" requires aligning interdependent holons to achieve robust sales and profits, though it requires more effort than focusing on just one area.