tape recorders

“He promptly yelled at Lou Piniella for playing cards with Rivers—though he said nothing to Rivers himself—then returned to his first-class cabin and issued an edict that the players were not to play tape recorders without headphones.”

Simon & Schuster: The Greatest Game

“In 1947, Ampex Corporation sold its first Ampex Model 200 audio tape recorders as a viable commercial product, aided by the 3M Corporation, which created the crucial magnetic tape medium for the recorders.”

Simon & Schuster: The Movie Business Book, Third Edition