Operating system basically make connection between user and computer.Operating system responsible for all the coordination and management and sharing of the resource of computer.The operating system is very important for to work without operating system computer not work means Operating system work as a host which handle the detail of all hardwares. Each and every hardware have own application.the operating system runs the computer and allow to run other programs.

         In large computer more work to do for Operating system like in monitor have different programs and user want to use it smoothly without interference,Operating system play very important role in security of system.there are different type of operating system like

Real time Operating System.It basically respond the input of computer instantly.It design to run application with very precise timing and with high degree of reliability.It important in measurement and automation of the system.for each critical operation the real time operating system must know the maximum time to complete this operation.If the operation delay it mean the real time operating system work for safety hazard.

 

Multiuser Operating System.It allow multiuser to access the signal program simultaneously.Few people use this operating system know like few in hundreds.Its very complicated need to be manage properly first because important task need to connected the users.It is different from the single user system on the network in that each user access same operating system from different machine.

 

Mulprocessing Operating System.It allow the program to run in more then one central processing unit (CPU) withen a single computer.These type of operating system are use when high speed require for huge volume of data.These system are basically use in satllite and weather forecasting.

 

 

Multitasking Operating System.It allows to run more then one program at a time.It make able to track that where the other task and how to go and perform without losing any information may be due to this system the computer well be slow.

 

Mutithreading Operating System.It allow different varied part of one program use simultaneously and it enable to process the multiple threads.It improve the stability of program.The multitasking operating system protect computer from crashing while multithreading system protect program from crashing