Braille pattern dots-26 Braille pattern dots-26 The Braille pattern dots-26 ( ) is a 6-dot braille cell with the middle left and bottom right dots raised, or an 8-dot braille cell with the upper-middle left and lower-middle right dots raised. It is represented by the Unicode code point U+2822, and in Braille ASCII with the number 5. In unified international braille, the braille pattern dots-26 is used to represent an unrounded open-mid to close-mid front vowel , such as /e/, /e̞/, or /ɛ/ when multiple letters correspond to these values, a question mark, or is otherwise assigned as needed. Related to Braille pattern
Morse code which became known as "Hamburg alphabet" by Friedrich Clemens Gerke in 1848. It was adopted by the Deutsch-Österreichischer Telegraphenverein (German-Austrian Telegraph Society) in 1851. This finally led to the International Morse code in 1865. In the 1890s, Morse code began to be used extensively for early radio communication, before it was possible to transmit voice. In the late 19th and early 20th centuries, most high-speed international communication used Morse code on telegraph lines, undersea cables and radio circuits. In aviation, Morse code in radio systems started to be used on a regular basis in the 1920s. Although previous transmitters were