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-124 Braille pattern dots-124 The Braille pattern dots-124 ( ) is a 6-dot braille cell with the two top dots and middle left dot raised, or an 8-dot braille cell with both top dots and the upper-middle left dot raised. It is represented by the Unicode code point U+280b, and in Braille ASCII with F. In unified international braille, the braille pattern dots-124 is used to represent unvoiced labial fricatives, such as /f/ and /ɸ/, and is otherwise assigned as needed. It is also used for the number 6. Related to Braille pattern dots-124 are Braille patterns 1247, 1248, and 12478,