NBN EN 1332-3 : 2009

      Foreword
      Introduction
1 Scope
2 Normative References
3 Definitions
4 Functional Sections of the Keypad
      4.1 Function keys
      4.2 Keypad
             4.2.1 Numeric keys
             4.2.2 Command keys
             4.2.3 Principles for the arrangement of
                      command keys
5 Design Requirements and Recommendations
      5.1 General design recommendations
      5.2 Colour and keypad surface
      5.3 Number and positioning of key legends
      5.4 Indication of function on keycap
6 Conformance
7 Labelling and Packaging

Defines the arrangement, location and number of command and numeric keys. Design recommendations and criteria are provided, as well as example layouts. Arrangement of function keys and alphanumeric keys are not covered.