ABSTRACT
American broadcasting made the transition from a small radiosystem dominated by four networks to a far larger AM-FM radioand television system in which networks concentrated on television and left radio stations to their own programming resources during the seven years from late 1945 to early 1952. A reader only familiar with today’s broadcasting would hardly recognize the limited system of 1945, while the 1952 system contained all the elements to be found a quarter-century later, and most of those present today.
