communication timeline . \:
Post on 08-Feb-2016
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COMMUNICATIONTIMELINE. \:By: Paige Copeland.
2400 BC The abacus, the first known calculator,
invented in Babylonia.
1280 Eyeglasses were invented by Salvino
D’armate.
1450Johann Gutenberg invents a printing press using removable metal type.
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.
1581 Pendulum invented by Galileo.
1679 Pressure cooker invented by Denis Papin.
1792Mechanical semaphore is invented in France.
1798 Vaccination invented by Edward Jenner.
1869 Mendeleev produces the Periodic Table.
1876Alexander Graham Bell invents the telephone, transmitting the sound of the voice clearly over electrical wires.
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