@chfour Is there any story for this?
It's ortholinear, so unlikely to follow typewriters, and I don't recognize it being based on letter frequency of languages I know (while the first row is a video game name).
Unless these are commands that just look like letters.
@lukyan @chfour I‘m guessing this is just designed for G-Code where most common Letters are G, X, Y, Z, M, I, J or something like that