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

End Of Line

    (EOL) Synonym for newline, derived perhaps from
   the original CDC 6600 Pascal.  The abbreviation "EOL" is
   now rare, but widely recognised and occasionally used for
   brevity.  Used in the example entry under BNF.

   Out of context this would probably be (deliberately) ambiguous
   because different systems used different (combinations of)
   characters to mark the end of a line.  Unix uses a line
   feed; DOS uses carriage return, line feed (CRLF) and the
   Macintosh uses carriage return.

   See also EOF.

   (2002-03-22)