What type of software is the Windows operating system categorized as?

The Windows operating system is categorized as proprietary software. This classification indicates that the software is owned by a company or individual, and it is not freely available for modification, redistribution, or use beyond the terms set by the owner, which, in this case, is Microsoft. Users must purchase licenses to use Windows, and the source code is kept confidential, preventing anyone from altering or distributing it without permission from Microsoft.

Proprietary software often comes with specific terms of service and user agreements that outline how the software can be used. It also typically receives ongoing support and updates from the creator to enhance performance and security, which adds value for consumers. In contrast, open-source software allows users to view, modify, and distribute its source code freely, while shareware usually comes with a trial period before requiring payment. Public domain software is completely free to use without restrictions, which is not the case with Windows.