# Computer history - 1600's

Year |
Event |

1600 |
William Gilbert coins the term electricity from the Greek word elecktra. |

1617 |
John Napier introduced a system called "Napiers Bones," made from horn, bone or ivory the device allowed the capability of multiplying by adding numbers and dividing by subtracting. |

1621 |
The circular slide rule is invented by William Oughtred. |

1623 |
Blaise Pascal is born June
19, 1623. |

1623 |
The first known workable mechanical calculating machine is invented by Germanys Wilhelm Schickard.
The machine is based on the idea of Napier's Bones, mentioned
earlier. |

1632 |
William Oughtred of Cambridge
combines two Gunter rules to make a device that resembles today's
slide rule. |

1642 |
Frances Blaise Pascal invents a machine, called the Pascaline, that can add, subtract, and carry between digits. |

1662 |
Blaise Pascal passes away
August 19, 1662. |

1671 |
Gottfried Leibniz introduces the Step Reckoner, a device that can
multiply, divide, and evaluate square roots. |

1679 |
Gottfried Leibniz demonstrates binary arithmetic, a discovery that shows every number can be
represented by 0 and 1 only. |

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