Note that all of these keyboards except the Knight have a second pair of parens: the unshifted characters on the keys just right of P, where the PC/Windows layo

Note that all of these keyboards except the Knight have a second pair of parens: the unshifted characters on the keys just right of P, where the PC/Windows layouts have square brackets. (In turn forcing square brackets into the shifted position, and curly braces onto other keys.) This helps to balance the wear on the keys. ;)