This feature will allow you to specify a time to shutdown the computer. Very handy for unattended operations. When the Auto Shutdown box is checked, the computer will perform normal housekeeping and turn off at the specified time. Identical in operation to selecting ShutDown from the finder Special menu. If the Do only once box is checked, the auto shutdown flag will be cleared the next time the program restarts. Uncheck this box if you want the shutdown to occur the same time each day without manually setting it.