1.
4. OPERATING SYSTEM
DONE BY DINESH.A

2. TYPES OF SOFTWARE System Sofware (Predefined)
Application Software (Extra Application)
Eg : Ms.off, Photoshop,etc.,

4. INTRODUCTION TO OS OS – Operating system
It is an mediator (Interface) User and sytem.

5. Popular OS System OS MOBILE OS WINDOWS 1)ANDROID 2) LINUX 2) IOS
3)UNIX
MOBILE OS
1)ANDROID
2) IOS

6. Need for operating System
Ensure & Extract
Esy Interaction
Booting
Controlling Input/Output Devices
Mange the Utilization of Main Memory
Security

7. Types of OS Single User Multi User
Only a single User to perform a task at a time.
To Accessed by a Multiple Users at a time.

8. Key Features of OS. User Interface File Management Memory Management
Fault Management
Process Management
Security Management

9. 1) USER INTERFACE GUI LINUX Graphical User Interface.
Available GUI Based Distribution.

10. Process of controlling & coordinating computer Main Memory
2)MEMORY MANAGEMENT
Os Response For
Portion of Memory
Data Move
Allocation of Memory
Process of controlling & coordinating computer Main Memory

11. 3) Process Management Collection Process Communicate & Synchronize
Unit of work (Program) in a Computer
Collection Process
OS – Executed by System Code
User process by User code

12. Algorithms of the Process
FIFO (First In First Out)
SJF (Shortest Job First)
ROUND ROBIN
BASED ON PRIORITY

13. 1) FIFO (First In First Out)
Queuing Technique

14. 2) SJF (Shortest Job First)
Based on the size of the Job

15. 3) Round Robin (RRS) Time sharing system
Jobs are assigned and processor time in a circular method

16. 4) Based on priority
The given job (Process) is assigned based on a priority
Higher priority is more Important then other Jobs

17. 4) Security Management Major challenge in Software industry
To Product User’s legitimate data from hackers.
Three Level of securities
Fill Access Level
System Level
Network Level

18. 5) Fault Tolerance OS should be “Robust” FaultCrash
Fault Tolerance Capabilities

19. 6) File Management Important Function
OS Manages the files, folders and directory systems on a computer
FATFile Allocation Table
NTFSNext Generation File System

20. 7) Multiprocess Parallel
Two are more processors at a some time to be Executed.

21. 8) Time-Sharing To Execute Multiple tasks (or) Processes concurrently
Each task a fixed time Allocation

22. 9) Distributes OS
Stored and processed on Multiple physical locations Access through the Internet.
Advantages:
Data Sharing
Multiprocess
Improves the Interaction
Reduces the Loading

23. Prominent OS
UNIX
Microsoft Windows
LINUX
IOS
Android

24. Various Operating System
Windows
LINUX
Red Hat
Mac OS
Free BSD
Solaries
Sun Cobalt

25. 1) UNIX
Multitasking OS
1970Ken thompson & Dennis Ritchie.

26. 2) LINUX Open source OS Easy to customize
Various versions and Updates.

28. LINUX
FEDERA
UBUNTU
BOSS
LINUX MINT
RED HAT.

29. 3) MICROSOFT WINDOWS
Developed Microsoft coporation (Intel&AMD)

30. Os for Mobiles Devices
Apple ios
Google Android

31. 1) Android OS Developed by Google
Touch Mobile, Smart phone, Tablet, Smart Tv, etc.

32. Versions
AAlpha
BBeta
LLollipop
O Oreo
K KitKat
NMougat

33. 2)ios (iphone OS) Developed by Apple Iphone Mobile devices,ipad touch
2nd most popular OS.

34. Windows Version 1985Windows 1.0 1990 Windows 3.2 1995 Windows 95
2001 Windows XP
2006 Windows Vista
2009 Windows 7
2012 Windows 8
2015 Windows 10

35. Elthampuravadai (Vill)
Thank You
Done by Dinesh.A
Moblie No
Elthampuravadai (Vill)
Kilpennathur post
Thiruvannamalai Dt.

36. We Growth our
Technology