A timeline of the history of computers By ioannis sklavounos 2300 BCE 2700 – 2300 BC The abacus is actualized. 400 BCE 100 – 400: The Hindu-Arabic numeral system is invented 1819 1819 – 1837 Babbage creates difference and analytical engines Period: 1904 to 1907 1904 – 1907: Inventions of the diode and triode Inventions of the diode and triode 1943 1943 – 1945: Construction of Colossus Construction of Colossus Period: 1973 to 1974 1973 – 1974 Development of ethernet
