Perhaps Braillists? Although Braille is a logical coding system (I used to work on Braille note takers such as the Blazie Braille Lite and Braille 'n' Speak...needless to say I had to use Braille to input commands! I used to use a "cheat" but still remember some letters....

Of course there is one letter in Braille that doesn't obey the logical rules...."W" why? Braille was a Frenchman and French doesn't use "W"....

Hey is that why "W" doesn't like the French?