Abstract: A method and system for the automatic alteration of a display of multiple user selectable menu options. A counter is associated with each user selectable menu option. The counter associated with a user selectable menu option is then incremented in response to each selection by a user of the user selectable menu option. The display of the user selectable menu option is automatically altered in response to a state of the associated counter.

Abstract: A digital computer is provided having a clock generation circuit for generating a clock signal in response to an input signal from a fixed-frequency oscillator, which includes a first fixed-frequency oscillator and a second fixed-frequency oscillator, each providing an output signal. Also included is failure detection circuit for detecting a failure of either of the fixed-frequency oscillators, wherein a failure occurs when the first fixed-frequency oscillator or the second fixed-frequency oscillator ceases generating an output. A circuit synchronizing the output from the oscillators is coupled to both the first fixed-frequency oscillator and to the second fixed-frequency oscillator. This synchronizing circuit modifies the output from the second fixed-frequency oscillator to produce a synchronized output that is substantially synchronous with the output from the first fixed frequency oscillator.