German language friendly keyboard for computer or other measuring instrument, arranges letter keys as such that keys with most commonly used letters are in close reach with each other

摘要

The keyboard has four sets of keys. The uppermost set contains the typical number keys and associated symbols e.g. dollar sign, mathematical symbols. The three remaining sets contain the letter keys. The keys with the most commonly used letters are positioned in close reach with each other and are made accessible by the user's fingers.