Why are the keys arranged the way they are on a QWERTY keyboard?

QWERTY keyboard!!

the reason are!!!


when the computer/keypad

 were invented they were very slow

they made the keypad 

with the 5/6 most used letters on the left 

to slow right-handed people [most people] 

down and stop the computers freezing up

 reducing risk of the typing arms jamming

faster, easier and more ergonomic to type with

least used letters

Q, X, and Z, are put at the corners of the keyboard, 

where the fingers take the most effort to reach

information that i get from page that i have link for this picture.
just click this picture to know more!! ^^