其中一些选项控制它输出非打印字符的方式，例如制表符和控制字符。
Some of them control the way it outputs nonprinting characters, such as tabs and control characters.
为计算机的存储和文本的打印设置的128字幕数字和特殊控制字符。
A set of 128 alphanumeric and special control characters used for computer storing and printing of text.
ASCII设备控制字符最初是用于控制硬件设备的，如：打印机、录音设备。这个字符不属于HTML文档。
ASCII device control characters were originally designed to control hardware devices like printers and tape drives. These characters have nothing to do inside any HTML document.
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