# 라이센스 :::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. ::: 시스템의 구성요소들에 대한 라이선스를 문서로 정리합니다. - [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/).