# System on a Chip A System on a Chip (SoC) integrates most of a computer's parts — [[Central Processing Unit]], [[Graphics Processing Unit]], memory controllers, wireless radios, image processors, and increasingly an AI accelerator — onto a single piece of silicon, rather than wiring separate chips together on a board. Putting everything on one die makes devices smaller, cheaper, faster, and far more power-efficient. The SoC is why a smartphone the thickness of a few coins outperforms a desktop computer from a decade earlier. Apple's M-series and A-series chips, Qualcomm's Snapdragon, and Google's Tensor are well-known examples. ## Why it matters here The SoC explains a quiet but important shift in corporate power: design integration creates lock-in and leverage. When [[Apple]] designs its own SoC, it controls the performance, the upgrade cycle, and increasingly the repairability of the whole device — components are fused together and serialized (see [[Parts Pairing]]), so the line between "hardware" and "the company's permission" blurs. Integration is also why a handful of designers and one fabricator ([[TSMC]]) sit at a chokepoint: the most valuable SoCs in the world are designed by a few firms and can only be manufactured at the leading edge by essentially one company, in [[Taiwan]]. The SoC is where consumer convenience, corporate control, and supply-chain concentration all converge on the same tiny rectangle. ## See Also - [[Semiconductor]] — the chip the SoC is built on - [[Central Processing Unit]] · [[Graphics Processing Unit]] — the major blocks inside an SoC - [[Parts Pairing]] — how integration becomes a repair lock - [[Semiconductor Fabrication]] — why only a few firms can make leading-edge SoCs