The first OS installed in a computer. In a virtual machine environment, there may be a host operating system that interacts with the virtual machine monitor, which manages the virtual machines.

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.

VMware's 3.0 version goes on sale Monday and will allow a Linux "virtual machine" to run on Microsoft's Windows XP system, among other operating system twists. Stephen Shankland worked at CNET from ...

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 ...

Forbes contributors publish independent expert analyses and insights. Jayshree Pandya is Founder of Risk Group & Host of Risk Roundup. Humanity is at the tipping point, as the technology triggered ...

ON WEDNESDAY, Research In Motion, manufacturer of the Blackberry smartphone, announced its latest operating system, Blackberry 10. RIM has been struggling to remain relevant against an onslaught of ...