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"As a creature of the First World, I expect a factory making complex electronics will have the sounds of machinery, but in a place where the cost of labor is effectively zero, anything that can be made by hand is made by hand.
Rest assured, no matter how complex your electronics are they are assembled by thousands and thousands of tiny little fingers working in concert, and in those vast spaces the only sound is the sound of bodies in constant, unending motion."
Who is DAISEY ("The Agony and the Ecstasy of Steve Jobs")