A system software component that is external to the operating system kernel. If the phrase is used to refer to the operating system itself, it is redundant because an operating system "is" software.

The Xinu Approach Purdue author Douglas Comer Publisher Chapman & Hall Publication date May 22, 2025 About the book (from the publisher) Lauded for ...

Expertise from Forbes Councils members, operated under license. Opinions expressed are those of the author. A traditional operating system (OS) such as Windows, macOS and Linux facilitates user ...

Despite plans to make it the last major upgrade, Windows 10 was superseded by Windows 11, and now Microsoft support for Windows 10 has come to an end.