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Windows and macOS are commercial, proprietary operating systems. Microsoft and Apple sell the OSes either directly to manufacturers or to end users like you and me. We can then use the systems, but we can’t see the code that makes them run. We call this closed source software.
Most of the programs you run on Windows and macOS are also closed source, whether or not they cost you money. But some programs are free and open source. These are applications with source code that you’re free to view and modify as you wish. Learn more about living a free and open source life today.
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