Whether it’s the visual icons of Windows/macOS or the text-based commands of Linux , the OS provides the bridge between human intent and machine action.

The OS is the "manager" of the computer. Without it, you’d have to write manual code just to move your mouse or save a file.

Virtualization is the process of creating a software-based (virtual) version of a computer, rather than a physical one. It allows you to run multiple "computers" on a single physical machine.