The object is a metal panel made to fit a standard 19 inch rack-mount. On the front of the panel are 16 red indicator lights (all are populated) and 16 clear indicator lights (all are populated). These are divided into two groups of eight. Partiallly covering the printed panel labels are black plastic labels reading: MITE 4 CONTROL, MITE 7 CONTROL, CALIB. COMPARISON REGISTER with the COMPARISON REGISTER label mounted over the CALIB. label. On the back of the object are 2 terminal strips. Attached to the terminal strips is a board containing integrated circuits. A tag attached to the object reads "Whirlwind Indicator Panel s/n 4 3L".
Massachusetts Institute of Technology (MIT) Digital Computer Laboratory