字地址格式最常用。在这种格式中，每个信息元素前面带有一个字母。控制器将这个字母转到特定寄存器。
Word Address Format is mostly used. In this format, each element of information is prefixed by a letter. And the controller conveys the letter to a particular register.
控制字是一种特殊的RTF用来标记打印机控制符的格式化命令，也是程序用来管理文档样式的格式化信息。
A control word is a specially formatted command that RTF USES to mark printer control codes and information that applications use to manage documents.
设计了全局管理器的功能，定义了控制指令字格式；
The author designed the function of global management module and defined the format of control instruction.
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