Most of you in this room are carrying a triumph of this development with you today: the mobile phone. You could, however, argue that making phone calls whilst on the move is not particularly revolutionary. As early as 1958, the first analogue mobile telecommunication network was set up in Germany.
To begin with, however, the bulky telephone devices weighed an impressive 36 kilos, which is why they were only found in cars. It was only possible to make calls whilst actually driving, because the telephones consumed an enormous amount of electricity. A battery capable of lasting several hours or even days was completely unimaginable.