"QWERTY" does not mean quantum. "QWERTY" is a word that describes a keyboard with the layout you see. Its name comes specifically from those letters appearing in the upper-left-hand corner. That's how the word came about. There are other keyboard layouts, like the AZERTY, the QWERTZ, the Dvorak, the Colemak, the Maltron, and the JCUKEN. Those in all caps are the ones who got their names exactly the same way the QWERTY keyboard layout got its name.