# Public Architecture

AGX Open contains only four public concepts:

1. **Device** — selects a supported execution backend.
2. **Buffer** — stores input or output data.
3. **Kernel** — describes a user-supplied computation.
4. **Dispatch** — runs a kernel over a requested number of elements.

The bundled reference backend executes kernels on the CPU. It exists for education, testing, and API experimentation. It does not reproduce the private AGX engine.