It is used for engineering students

1. www.studymafia.org
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Seminar
On
Operating System

2. Content
 Introduction
 History
 What is Operating System
 Types
 Special Features of OS
 Functions
 Advantages
 Disadvantages
 Conclusion

3. Introduction
 An operating system is an integrated set of programs that is
used to manage the various resources and overall operations of
a computer system.
 It is designed to support the activities of a computer
installation.
 Thus, like a manager of a company, an operating system is
responsible for the smooth and efficient operation of the entire
computer system.

4. History
 The 1940's - First Generations
The earliest electronic digital computers had no operating
systems.
 The 1950's - Second Generation
The General Motors Research Laboratories implemented the
first operating systems in early 1950's for their IBM 701.

5. History…..
 The 1960's - Third Generation
 The systems of the 1960's were also batch processing
systems,but they were able to take better advantage of the
computer's resources by running several jobs at once.

6. What is an Operating System?
 An Operating System, or OS, is low-level software that enables
a user and higher-level application software to interact with a
computer’s hardware and the data and other programs stored on
the computer.
 An OS performs basic tasks, such as recognizing input from
the keyboard, sending output to the display screen, keeping
track of files and directories on the disk, and controlling
peripheral devices such as printers.

7. Operating System

8. Types of Operating System
 Batch Processing
 Real-time operating systems
 Time Sharing
 Single-User,Single task

9. Batch Processing
 Jobs together with input data are fed
into the system in a Batch
 The job are then one after another
 No job can be started until previous
job is competed

10. Real-time operating systems
 Real-time operating
systems are used to control
machinery, scientific
instruments and industrial
systems.

11. Time Sharing

12. Single-user, single task

13. Special features of OS
 Multi Tasking
 Multi programming
 Parallel précising
 Buffering
 Spoofing

14. Functions….
 Automatic transition from job to job as directed by special
control statements.
 Maintenance of internal time clock and log of system usage foe
all users.
 Facilities easy communication between the computer system
and computer operator.

15. Functions
 Processor management i.e. assignment of processors to
different tasks being performed by the computer system.
 Memory management, that is, allocation of main memory and
other storage areas to the system programs as well as user
programs and data.

16. Advantages
 It enables users to run their own computer without any
knowledge of coding.
 It consists of programs and data that runs on computers,
managing computer hardware resources and providing services
for various application software.

17. Disadvantages
 If any problems affected in OS, you may lose all the contents
which have been stored already
 Unwanted user can use your own system

18. CONCLUSION
 Operating System performs a wide variety of jobs.
 The functions of operating system are transparent to the user.
 This shows that operating system is very important part of
computer.

19. Refference
 www.google.org
 www.studymafia.org
 www.wikipedia.com