HJKL keys are a metho of navigating a cursor around the screen in a console program without using arrow keys or numpad. Popularized by their use in the vi text editor (originally written by Bill Joy on an ADM-3A terminal where arrows appeared over the h, j, k and l keys), these keys are also used in many roguelike games. Some early Apple II games used this setup prior to Apple's release of systems with arrow keys.