There is a book on Amazon: Destroying cancer (Tumors) with Ultrasound Why nobody, not even his doctors told him about this method? ! ? ! - Steve Jobs

But in the end, for something this complicated, it's really hard to design products by focus groups. A lot of times, people don't know what they want until you show it to them.

Now, I have something to tell you today. Mac OS X has been leading a secret double life — for the past five years. There have been rumors to this effect... but this is Apple's campus in Cupertino — let's zoom in on it — in that building right there... we've had teams doing the "just-in-case" scenario; and our rules have been that our designs for OS X must be processor independent, and that every project must be built for both the Power PC and Intel processors. And so today for the first time, I can confirm the rumors that every release of OS X has been compiled for both Power PC and Intel — this has been going on for the last five years. Just in case.

Simple can be harder than complex. You have to work hard to get your thinking clear enough to make it simple. But it's worth in the end, because once you get there, you can move mountains