Are there any keyboard layouts designed to use a reduced set of keys, such as the home row (asdfghjkl;) and the rows above and below?
I imagine typing would be easier to learn, a possibly more efficient, if (for example on the qwerty keyboard) the A and ; keys could double as left and right shift, the S key worked like num-lock, exposing a numeric keypad on the right side, and L key exposed punctuation and brackets on the left side, and so on.
Ive looked briefly at some key mapping software, and it seems that some products would allow this remapping (in effect creating additional modifier keys, with a default output if pressed alone), but it seems quite laborious to set up. Does anyone know of a product that enables this sort of setup easily?
Any research about whether such a scheme would work well in practice?