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| In an attempt to rationalize many different keyboard layouts, the ISO/IEC 9995 international standard specifies the layout of a harmonized keyboard that has 48 graphic keys and the space bar in the alphanumeric zone.
Guideline E1
Create a keyboard with at least 48 graphic keys and the SPACE key to support entry of Latin based characters. |
Although the keyboard for the USA can contain only 47 graphic keys, almost all manufacturers produce a 48-key keyboard to avoid the added costs of designing new keyboard layouts for other countries. For a product to avoid being unduly restricted, the logic that deals with keyboard direct output must be compatible with keyboard layouts having at least 48 graphic keys. You can design a product to use one or more keyboards.
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