The operating system is ocated between the underlying hardware and users, and is the bridge between them. Users can enter commands through the userinterface of the operating system.The operating system interprets the command, drves the hardware equipment and realizes the users requirements lnterms of modern standards, the operating system of a standard PC should provide the following functions:
1.Process management. Also known as processor management,its main taskis o ressonabl allocate the time of the processorand etfectvely manage thoperation of the processor.
2.Memory management. Because multiple programs share memory resources ,the main task of memory management is to locate, protect and expandmemory.
3.Equipment management. Allocate the equipment according to the detemined equipment allocation principle, so that the equipment and the host canwork in parallel, and provide users with a good equipment interface.
4.Document management.Effectively manage the storage space of fles,reasonably organize and manage the fle system,and provide more effectivemethods and means for file access and file protection.
5.User interface.The interface of user operating computer is called user interface (or user interface), Through userinterface, users can realize complexapplication processing only by simple operation.