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Period: to
FIRST GENERATION
There was so expensive. -
Period: to
SECOND GENERATION
There were much smaller, faster and cheaper -
Period: to
THIRD GENERATION
There were same sizes, faster and cheaper. -
Period: to
FOURTH GENERATION
There were small silicon cheap with thousand of circuits, smaller portable cheaper, less electricity, less heat. -
Period: to
FIFTH GENERATION
They can "think" their own artificial inteligent.