Related Clues:

• Microprocessor chip
• PC "brain"
• Apple chip, briefly
• PC chip, briefly
• PC heart
• Smartphone's OS runner
• Mainframe 'brain,' briefly
• Core of a tablet, briefly
• Computer's "brain"
• Apple chip?
• Computer "brain"
• PC core component
• PC's "brain"
• Computer heart
• Its speed is usually measured in GHz