The object is a metal panel apparently designed to bolt to a larger object. On the front of the panel are 16 red indicator lights (all are populated) and 16 white indicator lights (all are populated). A plate attached to the front of the panel reads DC IOR. Etched on the front of the panel is INDICATOR PANEL. On the back of the object are 2 terminal strips. Attached to the terminal strips is a board containing integrated circuits; these attachments obviously postdate the original object. A tag attached to this panel was marked "Whirlwind Stack 4E."