“Consider QWERTY”. 2008年6月18日閲覧。 “If two typebars were near each other in the circle, they would tend to clash into each other when typed in succession. So, Sholes figured he had to take the most common letter pairs such as "TH" and make sure their typebars hung at safe distances. …… QWERTY's effect, by reducing those annoying clashes, was to speed up typing rather than slow it down.”
