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-14 Braille pattern dots-14 The Braille pattern dots-14 ( ) is a 6-dot or 8-dot braille cell with the two top dots raised. It is represented by the Unicode code point U+2809, and in Braille ASCII with "C". In unified international braille, the braille pattern dots-14 is used to represent unvoiced palatal fricatives or unvoiced alveolar affricates, such as /ts/, or /ç/, and is otherwise assigned as needed. It is also used to indicate the number 3. Related to Braille pattern dots-14 are Braille patterns 147, 148, and 1478, which are used in 8-dot braille systems, such as Gardner-Salinas and Luxembourgish