![]() Operators could then translate the markings on the paper tape into text messages.Īlfred Vail estimated the frequency of letters in the English language and assigned the letters most commonly used the shorter Morse code sequences, while the more infrequent letters wereĪssigned longer sequences. Morse's original telegraph receiver used a clockwork and an electromagnet to mark the received pulses ![]() Invented a simple telegraph system that used only electrical pulses and silence between them. ![]() Samuel Morse, together with Joseph Henry and Alfred Vail The development of the earliest telegraph systems started in the 19th century following the discovery of electromagnetism in 1820. Morse code is frequently used in geocaching mystery caches (puzzle caches), CTFs and logic puzzles.
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