A keyboard arrangement that assigns alphanumeric and special character symbols to keys based upon the shapes of the symbols in order to facilitate learning to type. Attribute classes are defined according to the number, position, direction, or contours of the line segments that comprise the symbols....http://www.google.es/patents/US6932525?utm_source=gb-gplus-sharePatente US6932525 - Keyboard arrangement for easy acquisition of typing skills
Keyboard arrangement for easy acquisition of typing skills
