Definition of "qwerty"

It was the Monotype model D keyboard introduced in 1907 which became the standard for printers, with a "qwerty" typewriter lay and removable keybars which made the keyboard independent of the matrix case arrangement.

1978, Allen Kent, Harold Lancour, Jay E[lwood] Daily, editors, Encyclopedia of Library and Information Science, volumes 24 (Printers and Printing to Public Policy, Copyright), New York, N.Y., Basel: Marcel Dekker, page 109

The typewriter using separate characters on type bars striking on a cylinder soon dominated the market. Because adjacent striking bars tended to jam when struck rapidly, manufacturers abandoned the alphabetical placement of letters on the keyboard in favor of the left-to-right "qwerty" disposition that takes into account the frequency and sequence of letters in English.

1994, Henri-Jean Martin, “Beyond Writing”, in Lydia G. Cochrane, transl., The History and Power of Writing, Chicago, Ill., London: University of Chicago Press, page 465