The document discusses operating systems, defining them as an interface between the user and hardware. It describes the goals of operating systems and different types, including single-user and multi-user operating systems. The key characteristics of operating systems are also outlined, such as user interface, memory management, process management, file management, and security management.

1. Operating System Computer Seminar os

2. Definition Operating system is an interface between the user and hardware and it is also defined as one program that is running all the time in the computer

3. Goals Of Operating System Execute user programs in a user friendly atmosphere Make computer convenient to use Optimize computer hardware

4. Types Of Operating System Single-User Operating System Multi-User Operating System

5. Single-User Operating System This is one of the type of operating system were at a time only one user can operate the system. Example for single user operating system is Microsoft-Disk Operating System (MS-DOS)

6. Multi-User Operating System This is one of the type of operating system were more than one user can operate the system simultaneously. Example for multi-user operating system is Windows 2000, Windows Xp,Windows vista etc…….

7. Characters of Operating System User Interface Memory Management Process Management File Management Networking Capabilities Management Security Management Fault Tolerance Application Base Distributed Operating System

8. User Interface Operating System should concentrate on the user interface. Only way that you can interact with a computer is through the user interface. The User Interface of the Operating System should be appealing to the senses. Ex: Graphical User Interface (GUI)

9. Memory Management In Memory Management any error in the user program should not be allowed to spoil the entire memory. Operating System divides the memory into user memory and reserved memory. If some errors creep into the user program,user memory alone gets affected however reserved memory remains in unaffected condition.

10. Process Management Process Management undertakes the allocation of processors to 1 program. Several Algorithms are used to allocate the job to the processor FIFO (First In First Out) SJF (Shortest Job First) Round-Robin (Circular) Priority (Memory)

11. Security Management The biggest challenge to Computer’s industry is to safeguard one’s data. The Operating System provides 3 levels Security to the user (a) File Access Level (b) System Level (c) Network Level

12. Fault Tolerance Operating System should be robust . When there is a fault, the OS won’t crash since they have fault tolerance .

13. Application Base The OS should provide a solid basis for running many popular applications. For Example, One can type a text in word pad and also hear song in a music player at the same time.

14. DanielRajamani 08-CS-103 By