V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016):

ETX
       End of Transmission teXt


The Free On-line Dictionary of Computing (30 December 2018):

control-C
End Of Text
ETX

    (Or ETX, End of Text) The ASCII character with
   code 3.

   Control-C is the interrupt character used in the
   command-line interface of many operating systems,
   including Unix and MS-DOS, to force the currently running
   program to stop and return control to the user.

   [Jargon File]

   (1995-03-16)