The Radiation Lock
This is a small, but entertaining program. You are in a power plant when a
self-destruct mechanism is entered. Your job is to make the 9 numbers read
all 1's. The control panel is shorted out, so one button can affect 2 
different numbers. You use the number keypad to change the corresponding
number. A radiation meter measures the quickly rising radiation level. If it
hits 3, you die from radiation poisoning.

Nick Johnston (lzreye@aol.com)