28
edits
Changes
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| 1775 || USPS founded || Benjamin Franklin || <ref name="semaphore">{{cite web |url=https://about.usps.com/publications/pub119/pub119_v03_018.htm |accessdate=December 30, 2017}}</ref>
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| 1816|| Telegraph (Proof of Concept) || Francis Ronalds || <ref name="semaphore">{{cite web |url=http://historyofinformation.com/expanded.php?id=519 |accessdate=December 30, 2017}}</ref>
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