What does "open-source" mean concerning operating systems?

The term "open-source" in relation to operating systems refers to the availability of the source code to users, allowing them to not only access it but also to modify and distribute it freely. This concept promotes transparency, collaboration, and community-driven development. By providing users the ability to alter the source code, open-source operating systems foster innovation and customization, catering to various needs and preferences.

The essence of open-source software lies in the permission granted to the users, creating a community where individuals and organizations can improve the software, fix bugs, and develop new features. This participatory approach differentiates open-source from other types of software licensing that may restrict access or modification of the source code.