设备控制一

The Device Control One symbol was used mostly in computer terminals, printers, word processing systems, and telecommunication equipment in order to control functions belonging to various devices.

It is one of the four device control characters:  DC1,  DC2,  DC3,  DC4. They all provided the ability to transmit special instructions for controlling device functions and modes of operation. The assignment and interpretation of device control symbols depended on the specific device and communication protocol.

As for modern computer systems and applications, the U+0011 symbol is rarely used there, since other mechanisms and protocols are employed to control device settings and functions.

Like other control symbols, this one has no visible representation and doesn't occupy a lot of space on screen or in typed text. However, there is a separate symbol in 控制图片  2400–243F representing the graphical image of Device Control One as the abbreviation DC1 — ␑ .

符号 「设备控制一」 包含在 「基本拉丁字母」 块的 「C0控制」 子块中，并在1993年作为Unicode版本1.1的一部分获得批准。