An operating system (OS) is essential software that manages computer hardware resources and serves as an interface between the user and the hardware. It facilitates program execution, resource allocation, and multi-tasking among various applications while ensuring security and error handling. Different types of operating systems include batch, multitasking, real-time, and mobile OS.

1. Operating System
Md. Toha
ID: 213-15-4476

2. Agenda
What is Operating System
Architecture
Functionality:
Operation of OS
Feature of OS
Market Share
Types of OS
Summary
Operating System 2

3. What is Operating System?
An operating system (OS) is a collection of software that
manages computer hardware resources.
Without a computer operating system , a computer
would be useless. The operating system acts as a
Interface between the user and computer hardware
Operating System 3

4. Operating System 4
Architecture
We can draw a generic architecture diagram of an Operating System which is as follows:

5. Operating System 5
Functionality:
In the Computer System Hardware can only understand machine code (in the form of 0 and 1) which doesn't
make any sense to a naive user.
We need a system which can act as an intermediary and manage all the processes and resources present
in the system
An Operating System can be defined as an interface between user and hardware. It is
responsible for the execution of all the processes, Resource Allocation, CPU
management, File Management and many other tasks.
The purpose of an operating system is to provide an environment in which a user can
execute programs in convenient and efficient manner.

6. Operating System 6
Operation of Os:

7. Operating System 7
Operating System Features:
Protected and supervisor mode.
Allows disk access and file systems Device drivers Networking
Security.
Program Execution.
Memory management Virtual Memory Multitasking.
Handling I/O operations.
Manipulation of the file system.
Error Detection and handling.
Resource allocation.
Information and Resource Protection.

8. Operating System 8
Market Share:

9. Types Of Operating System:
Operating System 9
Batch Operating System
Multitasking/Time Sharing OS
Multiprocessing OS
Real Time OS
Distributed OS
Network OS
Mobile OS

10. Operating System 10

11. Operating System 11

12. Summary
As Operating System controls and coordinates the use of
the hardware among the various applications programs for
various uses, we can say that it plays a very important role
in computer system.
Operating System 12

13. Thank You