What is the name of the operating system that is free of cost?

Linux is the operating system that is known for being free of cost. One of the defining features of Linux is that it is open-source software, which means that its source code is available for anyone to view, modify, and distribute. This level of accessibility encourages a collaborative environment where developers and users contribute to the improvement and security of the operating system.

In contrast, Windows and macOS are proprietary operating systems, meaning they require purchasing a license to use. Unix, while it has some free versions available today, traditionally has been associated with licensing fees. The free nature of Linux makes it particularly popular among developers, tech enthusiasts, and users who prefer to avoid the costs associated with commercial operating systems. Additionally, the Linux community offers extensive support and resources, making it an appealing choice for individuals and organizations looking for a cost-effective solution.