Communications: Cellular mobile technology: The great multiplier: It can greatly expand mobile communications, but some technical and regulatory issues remain unsolved

The mobile telephone, used by subscribers in cars or trucks, is a limited service in the United States at present. Even a large city like New York has only 700 users, and spectral overcrowding has prohibited expansion of the service. But a new technology, cellular mobile radio telecommunications, is about to change this situation radically. With cellular technology, several hundred thousand users can be offered better service than is now available for hundreds.