Almost every electronic device now comes with an on-screen keyboard.
Today’s invention introduces an extra measure of novelty and functionality. Although there are lots of keyboards which claim to have arranged the keys according to which are most frequently used (in the population as a whole), the idea today is to use the mapping techniques recently applied to the US election to take account of population density variations.
Each key would have its usage frequency recorded and its on-screen size increased the more it was clicked. The electoral maps techniques could maintain a continuous surface of keys, whilst also changing their individual sizes.
This would make finding the keys most commonly used (by an individual) easier and thus improve both typing speed and accuracy.