The Enquiry symbol was designed for teletype and other communication systems. It was used to request a response from a remote device. As for communication protocols, the Enquiry symbol is applied to initiate data exchange by requesting confirmation to receive or deliver data.
The use of the U+0005 symbol has become less popular in modern computer systems and applications, since ts functions are often replaced by other communication methods and protocols such as TCP/IP, HTTP, and others.
Like other control characters, this symbol has no visual representation and doesn't occupy much space on screen or in typed text. There is a separate symbol in Control Pictures2400–243F . It represents a graphic image of the Enquiry symbol as the ENQ (Enquiry) abbreviation — .
The symbol “Enquiry” 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;
|Type of paired mirror bracket (bidi)||None|
|Simple case change||0005|
|UTF-16BE||00 05||0 5||5||00000000 00000101|
|UTF-16LE||05 00||5 0||1280||00000101 00000000|
|UTF-32BE||00 00 00 05||0 0 0 5||5||00000000 00000000 00000000 00000101|
|UTF-32LE||05 00 00 00||5 0 0 0||83886080||00000101 00000000 00000000 00000000|