Your smartphone is powered by a chip. The new iPhones, including the upcoming iPhone X, use one called an A11 Bionic, and other handsets, like the Pixel 2, pack a Snapdragon 835. But chips in modern phones are not homogenous pieces of silicon—they have specialized components, or hardware blocks, on them. Because of these multiple elements, processors like these are referred to as a "system on a chip." One of those blocks is the image signal processor, which takes the data from your camera and makes it into a photograph. Another part of the chip is the graphics processing unit, or GPU, and it's responsible for an increasing number of your phone's fanciest features.