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.

Just about every piece of technology has some form of an operating system – desktops, laptops, mobile phones, and servers, to name just a few. The Merriam-Webster definition of an operating system?

With cybersecurity threats on the rise and data breaches occurring almost every week, it’s natural to ask: What is the most secure operating system (OS)? Unfortunately, the answer isn’t ...

I've used nearly every possible desktop operating system known. I've experienced nearly every incarnation of Windows and MacOS, I've used just about all the various Linux distributions over the years, ...

Choosing an operating system in 2026 requires more thought than ever. Windows, macOS, Linux, and ChromeOS each offer unique strengths in hardware compatibility, software support, and user experience.

What's really the most popular operating system? That depends on how you look at them and who's doing the looking. For example, Net Applications shows Windows on top of the desktop operating system ...