SPRINGFIELD - It is perhaps the most readily recognizable Morse code message. Dot-dot-dot, dash-dash-dash, dot-dot-dot. The three dots, dashes and dots mean SOS, or send help. But Samuel F.B. Morse's ...
"Morse code" is used to express letters and numbers by combining codes of different lengths, such as "Ton Ton Ton, Toe". Although it is a Morse code that uses only two codes, it is hard to memorize ...