How to Stop a Computer From Rebooting

Michael shamos and his buddy used to spend a lot of time at the i b m building waiting to get some computer time when no one else was using them. They did some math and realized that if they changed one hole in the card, just one hole, they could probably stop the machine from rebooting. Shamos: "We're dying K because if this went on too long without their making a discovery, we would have to tell them"