1 янв 1947 г. - Transistor

Описание:

The first practically implemented device was a point-contact transistor invented in 1947 by American physicists John Bardeen, Walter Brattain, and William Shockley.

https://en.wikipedia.org/wiki/Transistor

In 1947, the transistor was invented,[8] leading the way to more advanced digital computers. From the late 1940s, Universities, the Military, and Business developed computer systems, to digitally replicate and automate previously manually performed mathematical calculations, with the LEO (computer) being the first commercially available general purpose computer.

https://en.wikipedia.org/wiki/Digital_Revolution