Morse code is 60 milliseconds. Using the word CODEX with 60 dot units, the dot length at 20 words per minute is 50 milliseconds. Because Morse code is usually sent by hand, it is unlikely that an operator could be that precise with the dot length, and the individual characteristics and preferences of the operators usually override the standards. For commercial radiotelegraph licenses in the United States, the Federal Communications Commission specifies tests for Morse code proficiency in words per minute and in code groups per minute. The Commission specifies that a word is 5 characters long. The Commission specifies Morse code
Braille pattern dots-23 Braille pattern dots-23 The Braille pattern dots-23 ( ) is a 6-dot braille cell with the middle and bottom left dots raised, or an 8-dot braille cell with the two middle-left dots raised. It is represented by the Unicode code point U+2806, and in Braille ASCII with the number "2". In unified international braille, the braille pattern dots-23 is used to represent a voiced bilabial consonant, such as /b/ or /ɓ/ when multiple letters correspond to these values, and is otherwise assigned as punctuation or accent mark, as needed. Related to Braille pattern dots-23 are Braille patterns 237, 238, and