Hitting computers with rocks: the history of publishing

From the early days of computerized publisher, Tor editor Patrick Nielsen Hayden explains the mystical thing they did with the rock: "For years, Tor had one computer: an IBM PC AT with an amber monitor. Towards the end of its life, in the late 1980s, it could only be rebooted by smartly hitting its CPU on the side with a particular rock. Several people shared the computer and each person had his or her own style of rock banging, and over time, the side of the CPU gradually bowed in due to repeated impacts. Claire Eddy still has the rock, kept in a high place of honor in her office."

The Sacred Rock of Tor