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-3456 Braille pattern dots-3456 The Braille pattern dots-3456 ( ) is a 6-dot braille cell with the top right, middle right, and both bottom dots raised, or an 8-dot braille cell with the top right, upper-middle right, and both lower-middle dots raised. It is represented by the Unicode code point U+283c, and in Braille ASCII with a number sign: #. In unified international braille, the braille pattern dots-3456 is used as a number indicator. † Abolished in Unified English Braille Related to Braille pattern dots-3456 are Braille patterns 34567, 34568, and 345678, which are used in 8-dot braille systems, such as