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.

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.