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-236 Braille pattern dots-236 The Braille pattern dots-236 ( ) is a 6-dot braille cell with the middle left and both bottom dots raised, or an 8-dot braille cell with the upper-middle left and both lower-middle dots raised. It is represented by the Unicode code point U+2826, and in Braille ASCII with the number 8. In unified international braille, the braille pattern dots-236 is used to represent various punctuation, often coupled with Braille pattern dots-356 as an opening mark. Related to Braille pattern dots-236 are Braille patterns 2367, 2368, and 23678, which are used in 8-dot braille systems, such as Gardner-Salinas