From the 1960s onward, the rotary dial was gradually supplanted by push-button telephones, first introduced to the public at the 1962 World's Fair under the trade name Touch-Tone (DTMF). Touch-tone technology primarily used a keypad in the form of a rectangular array of push-buttons. Although no longer in common use, the rotary dial's legacy remains in the verb "to dial (a telephone number)".
From the 1960s onward the rotary dial was gradually supplanted by push-button telephones first introduced to the public at the 1962 World's Fair under the trade name Touch-Tone (DTMF) Touch-tone technology primarily used a keypad in the form of a rectangular array of push-buttons Although no longer in common use the rotary dial's legacy remains in the verb "to dial (a telephone number)"