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1. Operating System
 Operating system is a collection of
programs that control all hardware and
other resources in the computer
system.
 Computer is useless without Operating
system
 Act as a Interface between User and
computer
 When computer is ON ,OS will first load
into the main memory
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2. Functions of OS
File management
Operating system creates and manages the
directory system on the secondary storage
devices
Text editor
Used to create simple text file
Running multiple programs simultaneously
 Display and deal with errors when it happens
 Act as a communication link between users
 System protectionJothishdl@gmail.com

3. Popular Operating systems for PC
DOS
Windows95
Windows XP
Windows vista
Windows 7
Windows 8
Linux
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4. Types of operating System
GUI-Graphical User Interface
Contains graphics and icons and is commonly navigated
using by mouse
Multi User:A multi user operating system allows for
multiple user to use the same computer at the same
time
Multi-processing: operating system compatible of
supporting and utilizing more than one computer
processor
Multi tasking: Operating system that allow multiple

5. DOS
Disk Operating System
It is single user operating system
Versions : 2.0,3.0,5.0,6.0.6.2,7.0
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6. Windows
User’s friendly support graphical
mode
 multi user operating system
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7. Contents of windows
 Desktop
Screen that you can starting windows
 Icons
Small graphical pictures that represents a file ,application ,device,etc.
 Menu
List of related commands that used to perform tasks in windows and
windows application
 Taskbar
Long horizontal bar at the bottom of the screen
 Window
Window is a boxed area in which view programs, files ,folders, drives etc
 File
File is a collection of text or any type of data stored on a storage device
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8. TUX
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9. What is Ubuntu? "ഉമുണ്ടു-ൻഗുമുണ്ടു-ൻഗബണ്ടു"
'(umuntu ngumuntu ngabantu')
•Ubuntu is a Linux-based Operating System
•It is Most Popular Linux Distribution.
•It is open sourced
Cost free
non-proprietary
•Strong focus on
Usability
Easy to installation
One user (initially— you can add more users

10. OPEN SOURCE
• Run for any purpose
• Study source code
• Modify source code
• Distribute and Publish

11. ORIGIN
• Ubuntu is an African concept
meaning “humanity toward
others”
• It is developed under Debian
Project.(Largest Linux software
development community)

12. Features
• Many different distributions
• Huge group of “free software proponents”
(open source)
• Ubuntu is free and always will be free.
• No key codes, activation, registration
• Ubuntu is most popular Linux-based OS
in the world (10 million users now)

13. Features(conti.)
• It take less
•installation time
•boot up time
•shut downtime
•Space
•Dual boot with Windows , MAC

14. Compatible
• Natively Compatible with MS programs
•MS Word
•Excel
•PowerPoint
•Outlook
•Publisher
•Dreamweaver
•Project
•Adobe Acrobat