Great article about Amazon´s transformation about a decade ago from an online book-seller into a billion-dollar, IaaS/cloud computing leader at API Evangelist
It is a clear and direct mandate, issued by Jeff Bezos (CEO and founder) to make sure all teams interact through well-defined service interfaces and do not interact on a point-to-point level.
My favorite sentence: “Anyone who doesn’t do this will be fired. Thank you; have a nice day! “