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the telegraph allowed instant communication over long distances
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Was the forerunner of fiber optics, it tried to transmit sound through a beam of light
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radio is a means of communication that is based on sending audio signals through radio waves,
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Television was invented to transmit images at a distance
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The computer was the first fully automatic programmable machine
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the tablet they built was to get a kind of personal computer in the form of a tablet aimed at education
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These phones are electronic devices that resemble a cell phone, it is like a personal computer but mobile, it allows communication like a normal cell phone.
