U+2415 Symbol for Negative Acknowledge
U+2415 was added in Unicode version 1.1 in 1993. It belongs to the block Control Pictures in the Basic Multilingual Plane.
This character is a Other Symbol and is commonly used, that is, in no specific script.
The glyph is not a composition. It has no designated width in East Asian texts. In bidirectional text it acts as Other Neutral. When changing direction it is not mirrored. The word that U+2415 forms with similar adjacent characters prevents a line break inside it.
The Wikipedia has the following information about this codepoint:
In data networking, telecommunications, and computer buses, an acknowledgement (ACK) is a signal that is passed between communicating processes, computers, or devices to signify acknowledgment, or receipt of message, as part of a communications protocol. Correspondingly a negative-acknowledgement (NAK or NACK) is a signal that is sent to reject a previously received message or to indicate some kind of error. Acknowledgments and negative acknowledgments inform a sender of the receiver's state so that it can adjust its own state accordingly.
Representations
| System | Representation |
|---|---|
| Nº | 9237 |
| UTF-8 | E2 90 95 |
| UTF-16 | 24 15 |
| UTF-32 | 00 00 24 15 |
| URL-Quoted | %E2%90%95 |
| HTML hex reference | ␕ |
| Wrong windows-1252 Mojibake | â• |
| Encoding: GB18030 (hex bytes) | 81 37 85 31 |
Elsewhere
Complete Record
| Property | Value |
|---|---|
| 1.1 (1993) | |
| SYMBOL FOR NEGATIVE ACKNOWLEDGE | |
| GRAPHIC FOR NEGATIVE ACKNOWLEDGE | |
| Control Pictures | |
| Other Symbol | |
| Common | |
| Other Neutral | |
| Not Reordered | |
| none | |
| Symbol for Negative Acknowledge | |
| ✘ | |
| Symbol for Negative Acknowledge | |
| Symbol for Negative Acknowledge | |
| ✘ | |
| Symbol for Negative Acknowledge | |
| Symbol for Negative Acknowledge | |
| Symbol for Negative Acknowledge | |
| Symbol for Negative Acknowledge | |
| Symbol for Negative Acknowledge | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| Symbol for Negative Acknowledge | |
| Any | |
| ✔ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| 0 | |
| 0 | |
| 0 | |
| ✘ | |
| None | |
| — | |
| NA | |
| Other | |
| — | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| Yes | |
| Yes | |
| Symbol for Negative Acknowledge | |
| Yes | |
| Symbol for Negative Acknowledge | |
| Yes | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✔ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| Other | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| Other | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| Symbol for Negative Acknowledge | |
| None | |
| neutral | |
| Not Applicable | |
| — | |
| No_Joining_Group | |
| Non Joining | |
| Alphabetic | |
| none | |
| not a number | |
| Symbol for Negative Acknowledge | |
| U |