| **Components** are the foundational building blocks of software running in |
| Fuchsia. Each component is a composable, sandboxed module that interacts with |
| other components through capabilities. This promotes system security and |
| creates clear interfaces between individual components, making them easier to |
| update or replace. |
| |
| In Fuchsia, **everything is a component** (almost). Recall from the previous |
| discussion of Zircon that the surface area of the kernel is intentionally small, |
| with most core services being implemented in user space. This means that most |
| software running on Fuchsia is implemented using the component framework, |
| including: |
| |
| * User-facing applications |
| * Device drivers |
| * Filesystems |
| * Media codecs |
| * Network stacks |
| |
| Outside the kernel there are only a few low-level exceptions not using the |
| component framework, such as bootloaders and the `userboot` process. |
