ISO/IEC Information technology — Keyboard layouts for text and office systems is an ISO standard series defining layout principles for computer keyboards. It does not define specific layouts but provides the base for national and industry standards which define such layouts. The project of this standard was adopted at ISO in Berlin in under the proposition of Dr Yves Neuville. Spacing of keys and physical characteristics are covered, as are the principles governing the placement of characters and symbols on keys. ISO/IEC specifies a key numbering system which applies to all types of numeric, alphanumeric and composite keyboards of . Application of ISO/IEC in the design of keyboards will provide the user with a unified, predictable user-machine interface by dividing the keyboard into functional areas and sections and allocating functions to keys. ISO/IEC specifies the alphanumeric section of a keyboard and the division of that section into zones; the.