Operating system

1. OPERATING SYSTEM
Introduction To Computing

2. Contents:
• What is operating system?
• Operations of OS
• Structure of OS
• Features of OS
• GUI
• Multiuser
• Multitasking
• Multiprocessing
• Multithreading
• Types of OS
• Advantages and Disadvantages
• Conclusion

3. What is operating system?
Definition:
• An operating system (OS) is a
collection of software that
manages computer hardware
resources .
• The operating system is a
vital component of the
system software in a
computer system.
Without a computer operating
system, a computer would be
useless
“The operating system acts as a
Interface Between the user and
computer hardware”

4. • Providing a user interface
• Running applications
• Support for built in utility
programs.
• Control to the computer hardware

5. Operations Of OS
Start and shut down a computer
Coordinate Tasks
Establish An Internet Connection
Provide a user Interface
Configure Devices
Control a network
Manage Programs
Manage Memory
Provide Utilities

6. Structure Of operating system
User Interface
•User interact with operating system
Kernel
•Core of operating system, responsible for loading
operating system

7. Features Of Operating System
Operating
System
GUI Multiuser Multitasking Multiprocessing Multithreading

8.  Command line interface
 Graphical user interface

10. • GUI
• GUI - Short for Graphical User Interface, a GUI Operating System contains
graphics and icons and is commonly navigated by using a computer mouse.

11. • Multi-user
• Multi-user - A multi-user operating system allows for
multiple users to use the same computer at the same
time and/or different times example (LINUX)

12. • Multi Tasking
• An operating system that is capable of allowing multiple software
processes to run at the same time.
Below are some examples of multitasking operating systems.
• Unix
• Windows XP
• Windows Vista

14. • Multi Processing
• An operating system capable of supporting and utilizing more than one
computer processor.
More than one CPUs that can be shared
Below are some examples of multiprocessing operating systems.
For Example
• Linux
• Unix
• Windows 2000

15. • Multi Threading
• Smaller parts of a program are loaded when needed by OS.
• Operating systems that allow different parts of a software program to run
concurrently
Operating systems that would fall into this category are:
For example
• Linux
• Unix
• Windows 2000

16. Types of operating system
 Stand Alone operating system.
 Server operating system.
 Embedded operating system.

17. Stand
Alone
operating
system
WINDOWS
MAC OS
LINUX
Stand Alone operating system/Desktop operating system

18. Microsoft Windows:
Windows is a series of operating systems developed by
Microsoft. Each version of Windows includes a graphical
user interface, with a desktop that allows users to view
files and folders in windows.
For the past two decades, Windows has been the most
widely used operating system for personal computers PCs.
Stand Alone operating system/Desktop operating system

19. Advantages
Easy to
use
Update
Gaming
Familiar
Disadvantages
Expensive
Not
Stable
Not
secure
Advantages & Disadvantages of Windows

20. MacOS X:
• OSX is version 10 of the Apple Macintosh
operating system. OSX was described by
Apple as its first “complete revision” of
the OSsince the previous version is OS9,
with a focus on modularity so that
future changes would be easier to
incorporate.
• Written in c++ .c .objective -c
Stand Alone operating system/Desktop operating system

21. Advantages & Disadvantages Of MAC OS
Advantages
Great
GUI
Better to
graphic
designer
Stable
Secure
Disadvantages
Not
gaming
expensive
Not all
software
run

22. Advantages & Disadvantages of LINUX
Advantages
Free
Secure
Low pc
requirement
Disadvantages
Not all
software
run
Hard to
learn , use
and install
Not
familiarity

23. Server Operating system
Server operating systems are designed to provide platforms for multi-users , for
critical, network applications.
Their main purpose is to provide security, stability and collaboration. Most of them
come with a pack of dedicated software tools such as Web servers, e-mail agents
and terminal services The common applications for server OSes are:
 File and printer sharing
 Application services (including databases)
 Web site services
 E-mail, groupware and messaging
 Terminal services
 Caching

24. SERVER
NEEDS
Administration
Stability
Security
Server Needs

25. Mobile Operating system
Mobile OS
Symbian
OS iPhone OS
RIM
BlackBerry
Windows
Mobile Linux Palm OS

26. Computers
Mobile phones
3d televisions
Video game
ATM

27.  Easy to use
 User friendly
 Intermediate between all hardware's and
software's of the system
 No need to know any technical languages
 Its the platform of all programs

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

29. Conclusion
• 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.