"That's not a driver," she whispered. "That's a backdoor. From 1984."
The note read: "This is not for a computer. It is for the observatory’s dome motor. We lost the source code in the '97 fire. If the driver is gone, the dome is deaf. It cannot hear the stars anymore."
But this driver said: "I am the dome. What is the color of the sky at your latitude? If you answer correctly, I will move. If not, I will wait for someone who remembers."