History grade 5

Transistor: The vacuum tube triodes were signal amplifiers, but they consumed a lot of power and were unreliable. Bardeen, Shockley, and Brattain invented the transistor at Bell Labs in 1947. Its a solid-state triode that amplifies signals, processes digital [binary] logic, and can be densely packed into very small areas. billions of transistor radios were sold after being introduced in the 1950s, which led to new computers. the transistor helped bring about a massive technology and liberty revolution in our society in just 50 years,