An
operating system (OS) is a piece of software that manages computer hardware and
software resources while also providing services to applications. It is the
most basic software that runs on a computer and functions as an interface
between hardware and applications. A computer would be impossible to function
properly without an operating system.
An
operating system's key functions are as follows:
Process
Management :- It manages and allocates resources for various running processes,
allowing multiple programs to run concurrently on a single machine.
Memory
Management :- The OS handles memory allocation and deallocation, ensuring that
different programs and processes have access to the necessary memory without
interfering with each other.
File
System Management :- The OS provides a hierarchical structure for organizing
and storing files on storage devices like hard drives, solid-state drives, or
external storage media.
Device
Management :- It controls and interacts with hardware devices like printers,
keyboards, monitors, and other peripherals, enabling applications to
communicate with the hardware.
User
Interface :- The operating system provides a user interface that allows users
to interact with the computer, either through a graphical user interface (GUI)
or a command-line interface (CLI).
Security
:- OS plays a vital role in providing security features like user authentication,
access control, and protection against unauthorized access or malicious
software.
Microsoft Windows, macOS, Linux, Android, and iOS are all examples of operating systems. Each operating system has its own set of features, capabilities, and target devices, but they all fulfil the same basic purpose to properly manage and operate a computer system.
