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"Though the Apple Pencil is simple on the outside, the inner workings of the iPad Pro stylus are a major technological achievement, a new analysis from the silicon experts at Chipworks has found."^^<http://www.w3.org/2001/XMLSchema#string>
<http://appleinsider.com/articles/16/01/05/apple-pencils-incredible-design-packs-15-semiconductors-into-small-space>