A pipe is an operating system mechanism originating in Unix, which allows the user to direct the output of one process as the input of another process. See Pipe (Unix).

Pipe or vertical bar ("|" or "¦") is the name of the ASCII character at position 124 (decimal). The pipe character is depicted as either a solid vertical bar or a vertical bar with a break in the middle (broken bar). The character is usually depicted as a broken bar on IBM PC keyboards to distinguish it from other characters.

See pipe for other uses of the word.