Electromechanical Era (1840-1940)
Colossus Machine - to read German coded communication.
Telecommunication: Voltaic battery telegraph, telephone and radio.
Mark (1939-1944)
Electronic Era (1946- 1957)
Electronic device
Advent of solid device
Electronic numerical integrator and computer
Bigger machine, slower than others
Transistor (1947)
Fist full transistor computer
Integrated Circuit
Faster operating speed invented by Sack Kilby
Computer Processor
Productivity, entertainment worldwide which communicates
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