Highlight the keys.

The letters of the alphabet and some punctuation marks are in these three rows. The order of the keys is called QWERTY from the order of the keys on the top row.

This arrangement of the letters was inherited from the typewriter. It is not the most efficient layout. With the first typewriters, the typists had trouble with the mechanical keys jamming each other because the typists could strike the keys faster than the keys could get out of each others' way. So the letters were arranged to slow down the typists' speed. Now that electric typewriters and computer keyboards no longer have mechanical keys, a more efficient layout could be used. But so many people are familiar and skilled with the old way that it doesn't seem likely that the layout will change.