The U.S. has long led the world in communications. But in its awesome postwar expansion, U.S. industry discovered that the old communications methods were not good enough. The telephone, telegraph and teletype lines that connect the scattered plants of big corporations were limited in use, expensive to install and maintain. As a solution, industry is turning to another medium: microwave transmission,* i.e., ultra-high-frequency radio.

Already used by about 125 big corporations, microwave communication is flexible, and cheaper than any other system. With it, businessmen can do much more than talk with one another. They can run machines by remote control,...

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