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William Oughtred invented the slide rule. it was used for mutiplcation and division.
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Blaise pascal invented. It was used for basic arithmetic. They are mainly desktop calculators.
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Samule invented a calculator that can add and subtract.
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Leibniz inveted binary mathmatics. It represents text or computer processor instructions using the binary number system's two binary digits, 0 and 1.
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The Europians were the first to invent the telegraph. It was first in the form of semaphore lines. It was used to send messages to a distant observer through line-of-sight sgnals.
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Charles Babbage started the work of the Difference engine. It was an automatice mechcanical calculator. It was desinged to tabulate polynomial functions.
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Samual F. B. Morse conducted the first successful with the first telegraph. It was used encode messgaes.
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George Scheutz invted the printing calculator.
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Marvin Cameras inveted magnetic recording. It was also known as magnectic tape. It was used to record and play back audio and video.
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Was invented by William DeForest. It was yo control electric current through a vacuum in a sealed container.
