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Binary code which all modern electronics run off of was first practicesed in the binary number system invented by Gottfried Wilhelm Leibniz
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Morse Code was invented by Samuel F. B Morse
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The stop sign was developed by William Phelps Eno
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Used to calculate numerical information, created by Herman Hollerith
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The Smoke detector was first created by Francis Robbins Upton and Fernando J. Dibble,
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The general purpose zipper was invented by Whitcomb L. Judson.
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Modern Stop signs which direct traffic owe their heritage to their disant ancestors creation.
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Modern Zippers and prehaps velcro and other fabric combining products might just not be the same had it not been for the first zipper.
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The Carbon dioxide/smoke detector which sits in every house might not exist had it not been for the very first smoke detector.
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Modern calculators might not be the same or might not exist at all had their idean not been incepted and followed through.