Computetr

The history of computer

By Cris_RZ
  • 2300 BCE

    Abacus

    Abacus
    The abacus, also called a counting frame, is a calculating tool that was in use in the ancient Near East, Europe, China, and Russia, centuries before the adoption of the written Arabic numeral system.

  • The Neperian Ábacus

    The Neperian Ábacus
    Napier's abacus is an abacus invented by John Napier who published the description of it in a work printed in Edinburgh in late 1617 entitled Rhabdologia. By this method, the products are reduced to addition operations and the quotients to subtractions; As with the tables of logarithms, invented by himself, the powers are transformed into products and the roots into divisions.

  • The Pascalina

    The Pascalina
    The pascaline was the first calculator that worked on wheels and gears, invented in 1642 by the French philosopher and mathematician Blaise Pascal (1623-1662). The first name he gave to his invention was 'arithmetic machine'. Then he called «pascaline wheel», and finally «pascaline». This invention is the remote ancestor of today's computer