End-of-Transmission character: Difference between revisions

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{{Refimprove|date=August 2008}}In [[telecommunication]], an '''end-of-transmission character''' ('''EOT'''; visual representation: {{unicode|␄}}) is a [[transmission (telecommunications)|transmission]] [[control character]]. Its intended use is to indicate the conclusion of a transmission that may have included one or more texts and any associated [[message]] headings.<ref name=1037c1996>{{cite web |url=http://www.its.bldrdoc.gov/fs-1037/dir-014/_2015.htm |title=end-of-transmission character (EOT) |work=[[Federal Standard 1037C]] |year=1996}}</ref>
 
An EOT is often used to initiate other functions, such as releasing circuits, disconnecting terminals, or placing receive terminals in a [[standby]] condition.<ref name=1037c1996/> Its most common use today is to cause a [[Unix]] [[tty]] driver to signal [[end of file]] and thus exit programs that are awaiting input.
 
In [[ASCII]] and [[Unicode]], the character with the value 4 is EOT. It can be referred to as control-D, <tt>^D</tt> in [[caret notation]].{{Citation needed|date=March 2009}}. In Unicode, it is encoded at {{unichar|0004|END OF TRANSMISSION}}
 
== Meaning in Unix ==