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-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