Need Of an Operating System.

             

Operating System Need:-

                                                    An operating system Plays an important role of managing software, processes, security, I/O, files etc.In multitasking system every process need to access CPU, memory and storage.When we need to access any program then it will firstly copy into the main memory then after that it will execute and after execution it will save into hard disk, so this work done by the operating system. Operating system hide all these information from the users.  In earlier system user had no idea about the internal structure of computer system. They had to design the application according to the internal structure of the system. but now a day it transparent to the user.   

Usage of operating system:-

- Allow user to execute program and communicate with the computer.
- Interaction between hardware and user.
- Loading program in memory.
- Schedule program in main memory.
-Manage CPU cycle.
-manage Memory.
- Provide Security.