A building construction system is a formal scheme or process which governs the organization and arrangement of objects and materials into a regular and definite program of planning, designing, ordering, and building. Prefabrication is simply the assembly, either at the building site or in a factory, of smaller parts into a larger component. Industrialization implies the use of a variety of labor-saving tools and techniques in a planned process; a continuing market making high production of a repetitive character possible, and a continuing research and development effort. Little capital is required for simple prefabrication; large sums are needed for industrialization. A unique building system of the early French settlers must be noted. The French were colonizing from two directions: from Quebec across the Great Lakes and down the Mississippi; and from New Orleans up the Mississippi to St. Louis.