The document discusses different types of operating systems including desktop operating systems, server operating systems, and mobile operating systems. Desktop operating systems are recommended for personal use by different groups for reasons like ease of use, stability, and capabilities. Server operating systems are designed for multi-user environments and provide security, stability, and collaboration for applications like file sharing, web services, and email. Mobile operating systems control functions on devices like phones and tablets, with examples being Android and iOS.

1. By Mohamed Loey

2. Operating System The interface between the user and the computer hardware.

3. Operating System Functions

4. Operating System structure

5. Operating System Classification when two or more users can work with programs and share peripheral devices (printer, scanner, fax) multiple applications operated at the same time more than one CPUs that can be shared smaller parts of a program are loaded when needed by OS

6. Desktop Operating System If you ask your mum she'll tell you to use XP because she knows it so well, if you ask your geek friend he'll recommend you Linux because it's so stable, if you ask the cool designer at work , he'll tell you Mac OS cause you can build so many amazing things with it.

7. Desktop Operating System

8. Windows Advantage

9. Windows Disadvantage

10. Mac Advantage

11. Mac Disadvantage

12. Linux Advantage

13. Linux Disadvantage

14. Desktop Operating System

15. 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

16. Server Needs

17. Mobile Operating System operating system that controls a mobile device

18. Android OS

19. Mobile Operating System

20. Thanks