Braille Pattern Dots-57

⡐ is an eight-dot Braille pattern with dots 5 and 7 raised; by itself, it has no universal letter or word reading. A pattern’s reading depends on the Braille code in use: the familiar reading system uses six-dot cells (one sign’s dot layout), while eight-dot Braille adds two positions for technical and computer text. Braille developed from raised-dot experiments in 1821 linked to silent communication and learning to read by touch.