Recalls a previously entered command.
The ampersand (&) displays a previously entered command on the screen's command line. You can backtrack up to 100 commands by repeatedly typing the ampersand.
You can modify the command line before entering the command.
The ampersand command works in this manner only if you have not typed any other characters on the command line.
The ^ (Caret) command tracks previously entered commands in the opposite direction.