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PX4-Autopilot/docs/en/contribute/licenses.md
2025-07-03 14:53:12 +10:00

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# Licenses
::: info
All code contributions must be made under the permissive [BSD 3-clause license](https://opensource.org/license/BSD-3-Clause) and must not impose any further constraints on its use.
:::
This page documents the licenses of various components in the system.
- [PX4 Flight Stack](https://github.com/PX4/PX4-Autopilot) — BSD
- [PX4 Middleware](https://github.com/PX4/PX4-Autopilot) — BSD
- [Pixhawk Hardware](https://github.com/pixhawk/Hardware) — CC-BY-SA 3.0
- [PX4 User Guide](https://github.com/PX4/PX4-user_guide) (Documentation) — [CC BY 4.0](https://creativecommons.org/licenses/by/4.0/).