The ancient age, it's when cavemen made paintings in the wall to represent what they see.
With writing started the pre-mechanical era.
One of the most important items in the technology eras is the alphabet.
The first computer program was made by Ada Augusta
Johan Gutenberg invented metal type machine
-Pre mechanical.- in this era rises different things like alphabet, abacus, and petroglyph
-Mechanical.- in this era rises items such as difference engine and slide rule.
-Electromechanical.- like telegraph and telephone
-Electronic.- rises objects such as cpu and actual things.
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