John Srouji, the senior vice president for hardware technologies at Apple, profiled alongside his division by Bloomberg Business:

Srouji runs what is probably the most important and least understood division inside the world’s most profitable company. Since 2010, when his team produced the A4 chip for the original iPad, Apple has immersed itself in the costly and complex science of silicon. It develops specialized microprocessors as a way to distinguish its products from the competition. The Apple-designed circuits allow the company to customize products to perfectly match the features of its software, while tightly controlling the critical trade-off between speed and battery consumption.