I worked in the Kindle division and got to see a lot of the prototypes being soldered and tested. The most interesting one to me was the version that had a met

I worked in the Kindle division and got to see a lot of the prototypes being soldered and tested. The most interesting one to me was the version that had a metallic case with over 1,000 holes drilled into it as a esthetic design feature. This made it unmanufacturable - Foxconn had to buy thousands of additional CNC machines just to drill those little holes. If you're interested in reading about how physical items can be made unmfg., read about all the startups that request "Apple white plastic", which requires cleaning every machine in the factory to get bright white for just your run.