virtualization
user interface
the operating system.
interface
A "Tasking" Operating System
the operating system
Interface
Most operating systems native to the computer system allows users to communicate with the computer system
A Multitasking Operating System
The operating system, basically, allows a user to actually use the computer. Without an operating system, it would be like trying to drive a car that did not have an engine!
it allows only one user to run a same program as another user at a same time
An operating system provides an interface between the hardware and the user. It allows us to use computers without having to know how to program them.
No, icons and other graphical symbols are part of the Graphical User Interface (GUI output) as are mice and touch devices (GUI input) that allows the user to interact with apps and the operating system.