The standard keyboard that we use here in the U.S. (as well as other English-speaking countries, I assume) is called the Qwerty keyboard. It's named after the first letters on it: Q,W,E,R,T,Y. Back in the day, the layout was designed to keep typewriters from jamming. The letters are arranged to keep those that are commonly used together, far apart. So we have "Q" and "U" six buttons away from each other even though they are almost always used together. This kept fast typists from jamming typewriters. It made them type slower.
Today, the Qwerty keyboard is still the standard layout even though its arrangement is not only irrelevant, but is holding pretty much everyone's typing speed and accuracy back, while helping them develop ailments like carpel tunnel more quickly than a Dvorak keyboard.