As was noted above, each industrial unit, represented by a given industrial "plant", stands in close relations of interdependence with other industrial processes going forward elsewhere, near or far away, from which it receives supplies −− materials, apparatus, and the like −− and to which it turns over its output of products and waste, or on which it depends for auxiliary work, such as transportation. The resulting concatenation of industries has been noticed by most modern writers. It is commonly discussed under the head of the division of labor. Evidently the prevalent standardization of industrial.
