1. When referring to computer memory, a pipe is a temporary section of computer memory capable of linking two or more computer processors, increasing the overall efficiency of the computer.
2. Alternatively referred to as a vertical bar, the pipe is a computer keyboard key "|" that is two vertical lines above one another and commonly looks like a full vertical line. This symbol is commonly found on the same United States qwerty keyboard key as the back slash key and may also be shown with a small gap between the line as shown in the picture.
4. When using the pipe in a command it can be used in MS-DOS, Windows command line, and in the Linux console to display a command or a commands output one page at a time. For example, typing dir | more would display the output of the dir command one page a time.