Why are keyboard letters araanged as qwerty rather than juat normal abc?
The QWERTY keyboard layout was designed so that successive keystrokes would alternate sides of the keyboard so as to avoid jams in manual typewriters. First designs of manual typewriters using keyboards with letters on alphabetical order could not keep up with the speed of fast typers and the QWERTY keyboard layout was designed to reduce jamming. The QWERTY keyboard layout survived the era of electrical typewriters and the digital age because it was the first standard design. I put this answer together from different sources to give the most accurate reason for why the letters are arranged the way they are.
