system clock

Noun
  1. A time-of-day clock in a computer system (synset 104385111)
    is a type of: clock - a timepiece that shows the time of day
  2. An electronic device in a computer that issues a steady high-frequency signal that synchronizes all the internal components (synset 104384929)
    is a type of: electronic device - a device that accomplishes its purpose electronically

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