First touch-tone telephone

All of today's phones, whether landline or mobile, use the touch-tone system for dialling numbers. The first phone to use this system dialled a number on 18 November 1963, courtesy of the touch-tone phones of Bell Laboratories in the USA. Bell Labs had worked with Western Electric Inc to development transistorised dual-tone multi-frequency (DTMF) technology under its registered Touch-Tone trademark. The first Touch-Tone phones were made available to the general public in the towns of Carnegie and Greensburg in Pennsylvania, USA. Over the next few decades, the Touch-Tone service replaced pulse dialling technology and eventually became the world-wide standard. Even today, people talk of "dialling" phone numbers – although the rotary dialling system is long gone.