Comment Re:A runtime system is an OS (Score 2) 201
Of course there's hardware. There's always hardware. Computer software runs on hardware. There isn't some magic Star Trek alien cloud of pure energy where it runs. It's chips and circuit boards.
Unless you are running applications directly on real actual hardware you have an OS. Just because you call the application isolation mechanism a "virtual machine running under a hypervisor" instead of a "program running under an operating system" doesn't mean they're fundamentally different things.
It's just a matter of semantics as to what you call it. Apparently the current fashion is to call a new OS a hypervisor instead of an OS. Probably because it's easier to sell people on a new hyervisor than it is to sell them on a new OS when we already have so many of those.