The Four generations of computers

By Alex Shaw

What are the four generations?

First generation (1940-1956) Vaccum Tubes
Second Generation(1956-1963)Transistors
Third Generation(1964-1971)Integrated circuits
Fourth Generation(1971-present)Microprocessors

Below is a timeline, click on the years to see what computers were around in those times!

The Colossus

The Colossus was a very old computer made I the world war 2 by the British, and was one of England's best kept secrets. Below is a video about it, and how it worked!
Colossus: The World's First Electronic Computer - The Four Generations of Computers (1/4)