Morse code
Telegraph's dot-dash alphabet
A system of dots and dashes representing letters and numbers, named after Samuel Morse, who helped develop it for telegraph communication in the 1830s.
Each letter corresponds to a unique pattern of short signals (dots) and long signals (dashes): SOS is three dots, three dashes, three dots.
Originally transmitted by tapping a telegraph key, Morse code can be sent by sound, light, or any on-off signal: She blinked Morse code with a flashlight.
Though superseded by modern communication, it remains popular among amateur radio operators and is sometimes used as an accessibility method.
Small circular mark
beep · distress · emergency · decode · encode · message · alphabet · sequence
Electrical message system
- keyLock-opening device
- operatorOne who works machinery
- tapValve controlling liquid flow
- transmitterSignal-emitting device
receiver · sounder · relay · circuit · wires · electromagnetic · telegraphist · cablegram
Cured pig thigh
- amateurNonprofessional participant
- shortwaveHigh-frequency radio band
- transceiverDual-function communication device
- operatorOne who works machinery
antenna · frequency · transmission · call sign · airwaves · bandwidth · receiver · CW
Technique for retention
- practiceRepeated work toward mastery
- chartData shown visually
- flashcardLearning aid with prompt and answer
- memorizationCommitting information to recall
proficiency · speed · copying · sending · ear training · muscle memory
dot
Small circular mark
SOS · beep · distress · emergency · decode · encode · message · alphabet · sequence · timing
telegraph
Electrical message system
transmitter · receiver · sounder · relay · circuit · wires · electromagnetic · telegraphist · cablegram · ticker
ham
Cured pig thigh
- amateurNonprofessional participant
- shortwaveHigh-frequency radio band
- transceiverDual-function communication device
operator · antenna · frequency · transmission · call sign · airwaves · bandwidth · receiver · CW · maritime
mnemonic
Technique for retention
- practiceRepeated work toward mastery
- chartData shown visually
- flashcardLearning aid with prompt and answer
memorization · proficiency · speed · copying · sending · ear training · muscle memory
- communication systemsalphabet, sign language, Braille, hieroglyphics, cuneiform
- telegraphytelegraph, telegraphy, telegraph key, telegraph line, telegraph lines
- electrical signalsanalog signal, digital signal, audio signal, video signal, pulse
- notationsmusical notation, mathematical notation, decimal notation, scientific notation, dance notation
- telegraph eratelegraph operator, telegraph lines, telegraph wires, telegraph office, telegraph stations
- nautical signalssignal flag, signal flags, golf flag, semaphore, substitutes
Morse codespoken language
Audible verbal communication system
plain text · verbal communication · sign language · oral communication · cursive writing
Morse codenatural language
Human communication, not programming
plain English · multimedia · vernacular · analog signal · everyday language
Morse code5G
Current mobile network standard
fiber optics · satellite communication · instant messaging · digital messaging · digital communication