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Morse code is a system of encoding text characters as dots and dashes for telecommunication. Learn about its development, alphabet, speed, and how it is transmitted by sound, light or electricity.
Learn how to use Morse code abbreviations to speed up Morse communications by foreshortening textual words and phrases. See the table of selected abbreviations and their meanings, and the difference between abbreviations and prosigns.
Learn how to remember Morse code characters using visual, syllabic, or word mnemonics. Find examples of mnemonics for letters, numbers, punctuation, and more.
Learn about the history, principles, and applications of wireless telegraphy or radiotelegraphy, the transmission of text messages by radio waves. Find out how Morse code, CW, FSK, and RTTY were used in commercial, military, and amateur radio communication.
Prosigns are shorthand signals used in Morse code telegraphy to simplify and standardize procedural protocols. Learn about their history, notation, representations, and international variations.
A signal lamp is a device for optical communication by flashes of light, often using Morse code. Learn about the origin and evolution of signal lamps, especially the Aldis lamp invented by Arthur Cyril Webb Aldis in 1944.
Procedure words are words or phrases used to facilitate radio communication by conveying information in a standard format. Copy means that the information has been received satisfactorily, while roger means that the information has been received and understood.
Learn about the history and features of the original version of Morse Code developed by Samuel Morse and Alfred Vail for electric telegraph. Find out how it differs from International Morse and why it is nearly extinct.