chording keyboards are still extremely popular among the blind, after all, chording is how you type Braille. They appear on everything from mechanical Braillers

chording keyboards are still extremely popular among the blind, after all, chording is how you type Braille. They appear on everything from mechanical Braillers of the 1950's[1], to modern, electronic Braille displays and notetakers. Input methods based on this concept and adapted for the touch screen are even built in to both iOS[2] and Android[3]. [1] https://wecapable.com/perkins-brailler-braille-typing/ https://wecapable.com/perkins-brailler-braille-typing/ [2] https://support.apple.com/en-us/101637 https://support.apple.com/en-us/101637 [3] https://blog.google/products/android/braille-keyboard/ https://blog.google/products/android/braille-keyboard/