Telegraph key is a general term for any switching device used primarily to send Morse code. Similar keys are used for all forms of manual telegraphy, such as in electrical telegraph and radio telegraphy.
Read more about Telegraph Key: Types of Keys, Non-telegraphy Uses of Keys
Famous quotes containing the word key:
“Japanese mothers credit “effort” as the key determinant of a child’s achievement in school, while American mothers name “ability” as the more important factor.”
—Perry Garfinkel (20th century)