为美国办公机器国家标准中的键盘提供面向性能的键盘配置，并为字母数字机器提供键盘配置，ANSI X3。154.本标准描述了键盘上48个基本打印键的排列以及键上出现的大写和小写字符。

Provides a performance-oriented keyboard arrangement to the keyboard presented in American National Standard for Office Machines and Supplies-Keyboard Arrangement for Alphanumeric Machines, ANSI X3.154. This standard describes the arrangement of the 48 basic printing keys on the keyboard and the characters, uppercase and lowercase, that appear on the keys.