Alternatively referred to as a backward slash and reverse solidus, the backslash is a character "\" first introduced by Bob Bemer in 1960. A backslash can be used to represent a file path in MS-DOS and Windows, for example, c:\windows is an example of the backslash being used.
Note: Although "slash" is most often used to describe the forward slash, it could be used describe either a forward or backslash. It is better to say "backslash" instead of "slash" when telling someone to enter a backslash.
Tip: On English keyboards the backslash is on the same key as the pipe key.
Other uses of the backslash
A backslash may also be used for any of the following reasons.