An operating system (OS) is system software that manages computer hardware and software resources and provides common services for computer programs. The operating system is a component of the system software in a computer system.Application programs usually require an operating system to function.xamples of popular modern operating systems include Android, BlackBerry, BSD, Chrome OS, iOS, Linux, OS X, QNX, Steam OS, Microsoft Windows (and variant Windows Phone), and z/OS.
The aura is an electromagnetic field that surrounds every creature that exists. A form of energy emanating from your body, your aura can tell a lot about you, from your personality to your innermost emotions and conflicts.
Auras are usually visual but can also be sensory, motor or verbal disturbances. Visual auras are most common. A visual aura is like an electrical or chemical wave that moves across the visual cortex of your brain. Here, you see a functional MRI of a person during an actual visual aura.