Loved this comparison of 3 visionaries of our times by one of the 3:
Gates praised Zuckerberg’s drive, but described him as “more of a product manager”, insisting that he was more of a coder starting with architecture where Zuckerberg “starts with products, and Steve Jobs started with aesthetics.”
Gates = sw engr; Zuck = Product Manager; Jobs = UX. (To add to it, I would say Page/Brin = research scientist.) These really reflect what each company has morphed into. MSFT ended up as the largest software company, FB is probably one of the most widely used product ever. Apple makes the best UI. And Google uses research ideas, spits them into beta products quickly and rinses and repeats.