Morse code is a system of encoding text messages using a series of short and long signals, called "dots" and "dashes." These signals represent letters, numbers, and punctuation marks, allowing people to communicate over long distances using sound, light, or electrical impulses. For example, the letter "A" is represented by a dot followed by a dash, and the letter "B" is represented by a dash followed by three dots. Morse code was widely used in early telecommunication methods, such as by telegraph and radio, and is still used today in certain emergency or air travel communications.

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