At the begining of the time...
Every start with..
The abacus
(a chinese invention from unknown year)
Continue with...
Pascalina
(by Blaise Pascal, 1645, mechanical abacus)
And many time later...
First generation(1938-1958)
built in with vacuum valves and
were programed with holed cards)
(Mark I... Eniac...)
Second Generation:
(1951-1968)
Now they work with transistors,
and need less electricity than
previous computers.
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