\

from The Free On-line Dictionary of Computing (8 July 2008)
backslash
\

   <character> "\" {ASCII} code 92.  Common names: escape (from
   C/Unix); reverse slash; slosh; backslant; backwhack.  Rare:
   bash; {ITU-T}: reverse slant; reversed virgule; {INTERCAL}:
   backslat.

   Backslash is used to separate components in {MS-DOS}
   {pathnames}, and to introduce special character sequence in
   {C} and {Unix} strings, e.g. "\n" for newline.

   (2000-02-21)
    

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