Timeline IT By Ljus213 2000 BCE The Abacus Period: 2000 BCE to 1200 Prehistoric computering Period: 1200 to 1946 the Middle Ages of Computering 1440 Gutenberg invents modern printing 1712 Thomas Newcomen constructs the first steam engine 1774 Philipp Matthaus Hahn constructs the first known mechanical calculator 1800 Alessandro Volta builds the first electrochemical battery 1864 Johann Philipp Reis constructs the first Make-and-break telephone Period: 1946 to 2018 Modern computering 1950 the First generation of modern computering 1960 the Second generation of modern computing 1970 the Third generation of modern computing 1980 the Fourth generation of modern computing 2002 the Now now
