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-24 Braille pattern dots-24 The Braille pattern dots-24 ( ) is a 6-dot braille cell with the top right and middle left dots raised, or an 8-dot braille cell with the top right and upper-middle dots raised. It is represented by the Unicode code point U+280a, and in Braille ASCII with I. In unified international braille, the braille pattern dots-24 is used to represent unrounded, close or near-close, front vowel, such as /i/, /ɪ/, or /ɨ/. It is also used for the number 9. Related to Braille pattern dots-24 are Braille patterns 247, 248, and 2478, which are used in 8-dot