Ah, but once upon a time, Long ago, in a galaxy far, far away, CPU meant a large metal enclosure with circuit boards, main memory, power supplies and cooling.

Ah, but once upon a time, Long ago, in a galaxy far, far away, CPU meant a large metal enclosure with circuit boards, main memory, power supplies and cooling. Oh, and blinking lights. Don't forget the blinking lights like REAL computers on TV.