-
During the Second World War a group of scientist and mathematicians from the north of London finish the construction of the "Colossus", the first digital computer.
-
In 1944 at the Hardvard University, Howard Aiken and Grace Hopper made the Mark computer series in partnership with IBM. The Mark 1 was the first of this series. It need 4 seconds to perform a multiplication, and required a big room space
-
In 1946 the ENIAC (Electrical Numerical Integrator and Calculator) was developed by John Mauchly and John Presper Eckert. It use a more efficient system than the Mark 1: The vacuum tubes. It had 17,468 vacuum tuber
-
The transistor, a more efficient machine than the vacuum tubes, was invented. It was smaller, dissipated less heat and did not need the same care as the vacuum tubes.
-
The transistor replaced the vacuum tubes.
