Replica of the first transistor in operation, which today belongs to the company Lucent Technologies. TRANSISTOR It is an electronic component manufactured with a semiconductor material (magnificent connectivity and at the same time insulator, like metals) that can regulate and amplify a current that passes through of it, consuming very little energy. They replaced THERMOIONIC VALVES, which needed time to heat up and come into action, were larger, consumed more energy and broke down frequently. Thanks to this, radio, telephone and television were improved, thanks to the possibilities that opened up with the transistor and semiconductors such as silicon and germanium, very important for the industrial world. The researchers ended up becoming entrepreneurs and this was the origin of Silicon Valley! SE of San Francisco, with such important people as Frederik Terman, professor and director of the School of Engineering at Stanford University, and William Shockley, who leaves Bell Laboratories and founds his laboratory Shockley Semiconductor Laboratory). The transistor is considered the best invention of the 20th century