Backslash

The backslash (\) is a typographical mark (glyph) used mainly in computing and is the mirror image of the common slash. It is sometimes called a hack, whack, escape (from C/UNIX), reverse slash, slosh, backslant, backwhack, and in rare occasions, bash, reverse slant, and reversed virgule. In Unicode, it is encoded at U+005C \ reverse solidus (HTML: \).