Morse code and interword gaps may be lengthened so the word rate is only 5 words per minute. Using different character and text speeds is, in fact, a common practice, and is used in the Farnsworth method of learning Morse code. Some methods of teaching Morse code use a dichotomic search table. Morse Code cannot be treated as a classical radioteletype (RTTY) signal when it comes to calculating a link margin or a link budget for the simple reason of it possessing variable length dots and dashes as well as variant timing between letters and words. For the purposes of Information Theory
Braille pattern dots-235 Braille pattern dots-235 The Braille pattern dots-235 ( ) is a 6-dot braille cell with dots raised, or an 8-dot braille cell with raised. It is represented by the Unicode code point U+2816, and in Braille ASCII with the number 6. In unified international braille, the braille pattern dots-235 is used to represent an exclamation point, other punctuation, and otherwise assigned as needed. † Abolished in Unified English Braille Related to Braille pattern dots-235 are Braille patterns 2357, 2358, and 23578, which are used in 8-dot braille systems, such as Gardner-Salinas and Luxembourgish Braille. In the Japanese kantenji braille, the