|The way U.S. geographical patterns have developed in the period since World War II has been influenced greatly by technological changes over the same period. This was true in the era before the war as well, and the war itself brought a number of changes as war production altered manufacturing patterns. After the war, though, returning G.I.s and their families faced a changing landscape, with special efforts being undertaken to make it possible for more families to own a home, at least one car, and other new technological marvels. Business patterns also changed as there were new products to be produced and sold. The most important changes were in the areas of transportation and communication, which enabled changes in residential patterns that contributed to the growth of the suburb and in the long term to the decay of the central cities.