evolution of computers

By Ryanb123
  • Feb 4, 1000

    The tally method used 30,000 to 20,000 BCE

    The tally method used 30,000 to 20,000 BCE
    The tally system is a way of counting that is faster and more effective then counting with your hands. carved noches where found in Europe they where dated between 20,000 to 30,000 BCE.
  • Feb 4, 1200

    Abacus invented around 3,000

    Abacus invented around 3,000
    The abacus was invented around 3,000 BCE in Bbylonis. Early abaci used small stones or pebbles lined up in colimns in the sand.

  • Stepped Reconer invented in the 1670's

    Stepped Reconer invented in the 1670's
    This machine was used for multiplication dividon, and square roots. It uses the decimal number system and also uses the binary number system.