Back slashFirst introduced by Bob Bemer in 1960 and alternatively referred to as a reverse solidus, the backslash is a computer keyboard key "\" found on the same key as the pipe key on U.S. keyboards. The backslash can be used to represent a file path, such as c:\windows and is also often used in regular expressions, Linux, scripts, and numerous programming languages as an escape character.

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Also see: Forward slash, Keyboard terms, Slant, Slash