ISO/IEC 9995为所有字母数字键盘和数字键盘的布局定义了一个框架，涵盖了当今和未来使用键盘的最广泛的应用。要由键盘执行的功能被分成三个类别，这三个类别对应于键盘的主要物理部分。ISO/IEC 9995在键盘设计中的应用将通过将键盘划分为功能区和部分并将功能分配给按键，为用户提供统一的、可预测的人机界面。ISO/IEC 9995-1:20 09识别键盘的各个部分，并指定各个部分的大致形状和相对位置。涵盖了键的间距和物理特征，以及控制键上字符和符号放置的原则。ISO/IEC 9995-1:20 09规定了一种键编号系统，该系统适用于信息技术设备的所有类型的数字、字母数字和复合键盘。

ISO/IEC 9995 defines a framework for the layout of all alphanumeric and numeric keyboards across the widest spectrum of today's and upcoming applications using keyboards. The functions to be performed by keyboards are grouped into three categories that correspond to the main physical sections of the keyboard.

Application of ISO/IEC 9995 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 9995-1:2009 identifies the sections of the keyboard and specifies the general shape and relative placement of the sections. Spacing of keys and physical characteristics are covered, as are the principles governing the placement of characters and symbols on keys. ISO/IEC 9995-1:2009 specifies a key numbering system which applies to all types of numeric, alphanumeric and composite keyboards of information technology equipment.