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?

Facebook Inc. is building its own operating-system software to decrease its future dependence on rivals like Apple Inc. and Google, owners of the world’s most popular mobile operating systems. The ...

An operating system is the foundation of any computing system, controlling the input and output of data and ensuring that different programs and devices work together effectively. Examples of ...

The RabbitSys kernel is available preloaded on the RCM3365 RabbitSys core module and lets embedded-systems designers update, monitor, configure, detect, diagnose, and debug embedded systems from ...