In: Computer Science
We see that an operating system can be viewed as an "overall framework," as it were, for a piece of computing equipment to understand everything about itself. Without an operating system, a computer is just a collection of physical electronic components, disconnected from its surroundings and unable to operate at all.
As we know brain works as an "Operating System"(OS) for humans . As machines are nothing but a electronics device which can't be used for any processing or computing if we remove operating system from it same as human body is just a dummy without human OS i.e. our brain.
For machines OS works as an interface or we can say a communication medium between user and computer just like brain is a medium between human body parts and their working. Our OS controls all our activities, actions, and reactions same as machine OS controls machine's tasks, computing and working.
For machines OS manages it's resources, memory, devices attached to it same as for humans brain manages body parts, their movements and functionality. Brain makes decision for humans by observing current circumstances and analysing situation similarly OS makes decision for computer by analysing current status of different resources and memory.
If we remove OS from computer then it loses all it's qualities similarly if we remove brain(Human OS) from humans then human is nothing but a dummy which can't do anything by their own.