Keyboards of early MIT systems[1] and Lisp Machines[2] had brackets (parentheses) and square brackets on the same key where square brackets and curly brackets a

Keyboards of early MIT systems[1] and Lisp Machines[2] had brackets (parentheses) and square brackets on the same key where square brackets and curly brackets are on modern keyboards. 1: http://xahlee.info/kbd/sail_keyboard.html http://xahlee.info/kbd/sail_keyboard.html 2: http://xahlee.info/kbd/space-cadet_keyboard.html http://xahlee.info/kbd/space-cadet_keyboard.html