communication timeline . \:
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Communication Timeline . \:. By: Paige Copeland. 2400 BC. The abacus , the first known calculator, invented in Babylonia. 1280. Eyeglasses were invented by Salvino D’armate. 1450. - PowerPoint PPT PresentationTRANSCRIPT
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COMMUNICATIONTIMELINE. \:By: Paige Copeland.
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2400 BC The abacus, the first known calculator,
invented in Babylonia.
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1280 Eyeglasses were invented by Salvino
D’armate.
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1450Johann Gutenberg invents a printing press using removable metal type.
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1500 Ball bearing invented by Leonardo Da Vinci
together with flying machines, including a helicopter, the first mechanical calculator and one of the first programmable robots.
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1581 Pendulum invented by Galileo.
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1679 Pressure cooker invented by Denis Papin.
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1792Mechanical semaphore is invented in France.
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1798 Vaccination invented by Edward Jenner.
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1869 Mendeleev produces the Periodic Table.
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1876Alexander Graham Bell invents the telephone, transmitting the sound of the voice clearly over electrical wires.
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