Chapter 5: Operating System (Windows OS Explained)

 

 

OPERATING SYSTEM

Introduction:

An Operating System (OS) is the most important software in a computer.

It acts as an interface between the user and the hardware.

When a computer is switched on, the operating system is the first software that loads.

What is an Operating System?

An operating system is system software that manages computer hardware and provides services to users.

Examples:

Windows

Linux

macOS

Android

Functions of an Operating System

1.  Process Management

Controls execution of programs.

2.  Memory Management

Manages RAM efficiently.

3.  File Management

Creates, saves, and deletes files and folders.

4.  Device Management

Controls input/output devices.

5.  Security

Provides user authentication and data protection.

Types of Operating Systems

1. Single User OS

Supports one user at a time.

Example: MS-DOS

2. Multi User OS

Supports multiple users.

Example: Linux, UNIX

3. Multitasking OS

Allows multiple tasks simultaneously.

Example: Windows

4. Real Time OS

Used where immediate response is required.

Example: ATM systems

Windows Operating System

Windows is a popular operating system developed by Microsoft.

Features:

Easy to use interface

Multitasking support

Wide software compatibility

Desktop, Icons and Taskbar

Desktop: Main screen area

Icons: Shortcuts to programs

Taskbar: Shows running applications

Start Menu:

Start Menu is used to:

Open programs

Access settings

Shut down or restart the computer

Exam Important Points:

OS is system software

OS controls hardware

Windows is developed by Microsoft

Linux is open source

Android is a mobile OS

Conclusion:

An operating system is the backbone of a computer. Without it, a computer cannot function. Understanding OS concepts helps users work efficiently and confidently