About Morse code
International Morse code represents each letter and digit as a sequence of short signals (dots) and long signals (dashes). A space separates letters; a slash ( / ) separates words. Developed in the 1830s and standardized internationally, it was the first form of electrical communication.
Standard encoding: A=dot-dash, B=dash-dot-dot-dot, S=dot-dot-dot, O=dash-dash-dash, giving the famous SOS as ...---...