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-35 Braille pattern dots-35 The Braille pattern dots-35 ( ) is a 6-dot braille cell with the bottom left and middle right dots raised, or an 8-dot braille cell with the lower-middle left and upper-middle right dots raised. It is represented by the Unicode code point U+2814, and in Braille ASCII with the number 9. In unified international braille, the braille pattern dots-35 is used to represent unrounded, close or near-close, front to central vowel, such as /i/, /ɪ/, /ɪ̈/, or /ɨ/ when multiple letters correspond to these values, and is otherwise assigned as needed. Related to Braille pattern dots-35 are