Possible Clues:

• An Apple core?
• Brain of a computer (Abbr.)
• Computer part hidden in 'logic puzzle'
• Tiny number cruncher
• Apple core, of a sort
• Computer mainframe (acronym.)
• Brains of a tech start-up?
• Tablet's "brain": Abbr
• "Brain" hidden in "logic puzzle"
• Computer’s brains, briefly