Morse code a heliograph, a common flashlight, or even a car horn. Some mine rescues have used pulling on a rope - a short pull for a dot and a long pull for a dash. Morse code is transmitted using just two states (on and off). Historians have called it the first digital code. Morse code may be represented as a binary code, and that is what telegraph operators do when transmitting messages. Working from the above ITU definition and further defining a bit as a dot time, a Morse code sequence may be made from a combination of the following five-bit
Braille pattern dots-125 Braille pattern dots-125 The Braille pattern dots-125 ( ) is a 6-dot braille cell with the top left and both middle dots raised, or an 8-dot braille cell with the top left and both upper-middle dots raised. It is represented by the Unicode code point U+2813, and in Braille ASCII with H. In unified international braille, the braille pattern dots-125 is used to represent guttural fricatives and approximants, such as /h/, /ħ/, or /ɦ/, and is otherwise assigned as needed. It is also used for the number 8. Related to Braille pattern dots-125 are Braille patterns 1257, 1258, and 12578,