🌐EnglishEnglishDeutschEspañolFrançaisItalianoNederlandsPolskiPortuguêsSvenskaРусскийالعربية한국어中文日本語EntityQ1156388· pop 22· linked from 89 articlestelegraph keyAlso known as Morse keyelectrical switch used to transmit text messages in Morse codeAvailable in 21 languagesEspañolFrançaisDeutsch中文日本語РусскийItalianoCzechDanishEsperantoHebrewConnectionsrepetitive strain injuryEntityYouTubeConceptCategoriesAmateur radioHuman–machine interactionMorse codeTelegraphy