Device Control One

Symbol Meaning

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 Control Pictures2400–243F representing the graphical image of Device Control One as the abbreviation DC1 — .

The symbol “Device Control One” is included in the “C0 controls” Subblock of the “Basic Latin” Block and was approved as part of Unicode version 1.1 in 1993.

Text is also available in the following languages: Русский;



Unicode Name Device Control One
Unicode Number
CSS Code
Unicode Block Basic Latin
Unicode Subblock C0 controls
Unicode Version 1.1 (1993)
Keyboard shortcut ^Q
Version 1.1
Block Basic Latin
Type of paired mirror bracket (bidi) None
Composition Exclusion No
Case change 0011
Simple case change 0011
Encoding hex dec (bytes) dec binary
UTF-8 11 17 17 00010001
UTF-16BE 00 11 0 17 17 00000000 00010001
UTF-16LE 11 00 17 0 4352 00010001 00000000
UTF-32BE 00 00 00 11 0 0 0 17 17 00000000 00000000 00000000 00010001
UTF-32LE 11 00 00 00 17 0 0 0 285212672 00010001 00000000 00000000 00000000