Why are the typewriter keys arranged the way they are?

Question

Technology

Answer 1

Creators of the Dvorak layout of the keyboard tried to minimize the distance between the most commonly used letters, making one alternate between hands. The keyboard is also systematically arranged, so that the left hand has only vowels and a few consonants, while the right hand has all consonants.

In the QWERTY layout of the keyboard used for most computers, keys are arranged from each other for a faster typing speed.

Both Dvorak and QWERTY are equally efficient according to studies.