okay, but, how about some trully innovative stuff?
we need ten numbers in total (0,1,2,3,4,5,6,7,8,9) to form any number
we have ten fingers
with a device that recognizes which finger we tap (easy to implement) we can "type" numbers, as far as I can imagine, much faster, by tapping our ten fingers
or even more faster, if we tap two, three, etc fingers at the same time, to type 1, 2, 3, etc numbers (easy to implement too)
any comment on this?