An operating system (OS) is essential software that manages computer resources and provides a user-friendly interface. Its main functions include process management, memory management, file management, security, and command interpretation. Popular OS types include single-user systems like DOS and multi-user systems like Unix and Microsoft Windows NT.

1. Operating System
Name:
ID:

2.  Introduction
 Structure of OS
 Main function of Operating system
 Some popular Operating system
 Conclusion
Flow of presentation

3. Introduction
 Operating system is an integrated set of program that
controls the resources of a computer system and provides
its users with an interface or virtual machine that is
easier to use than the bare machine
 Operating System is a software, which makes a
computer to actually work.
 It is the software the enables all the programs we use.
 OS acts as an interface between the application programs
and the machine hardware.

4. Structure of OS
The two primary objectives of an operating system are:
 Make a computer system easier to use:- An operating
system hides details of hardware resources from
programmers and other users and provides them with a
convenient interface for using a computer system.
 Manage the resources of a computer system:- An
operating system manages all the resources of a
computer system. Efficient and fair sharing of system
resources among users and/or programs is a key goal of
all operating systems.

5. Main Function of OS
A separate module of operating system software performs
each of the function:
 Process management:- Process management module
takes care of creation and deletion of processes, and
providing mechanisms for synchronization and
communication among processes.
 Memory management:- Memory management module
takes care of allocation and de-allocation of memory
space to programs in need of this resources.

6. Continue…
 File management:- It takes care of file-related activities
such as organization storage, retrieval, naming, sharing,
and protection of files.
 Security:- Security module protects the resources and
information of a computer system against destruction and
unauthorized access.
 Command interpretation:- Command interpretation
module takes care of interpreting user commands, and
directing system resources to process the commands.

7. Some Popular OS
Operating System can also be classified as:-
 Single User Systems:-They are popularly associated
with Desk Top operating system which run on standalone
systems where no user accounts are required.
Example: DOS.
 Multi User Systems:-Provides regulated access for a
number of users by maintaining a database of known
users. Refers to computer systems that support two or
more simultaneous users.
Example: Unix, Microsoft Windows NT.

8. Conclusion
 Without Operating system the computers cannot run
the application and we cannot do work in the computer.
 Therefore Operating system is very important in
computer.