Introduction to operating system and main functions

What is an operating system?

The operating system is a computer program that manages computer hardware and software resources. It is also the core and cornerstone of the computer system.

The operating system needs to handle basic matters such as managing and configuring memory, determining the priority of system resource supply and demand, controlling input and output devices, operating networks, and managing file systems. The operating system also provides an operating interface for users to interact with the system.

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The role of the operating system:

The operating system is located between the underlying hardware and the user It is the bridge between the two. Users can enter commands through the user interface of the operating system. The operating system interprets the commands, drives the hardware devices, and implements user requirements.

In terms of modern standards, a standard PC operating system should provide the following functions:

1. Process management

Also known as processor management, its main tasks are Properly allocate processor time and effectively manage processor operation.

2. Memory management

Since multi-programs share memory resources, the main task of memory management is to allocate, protect and expand memory.

3. Device management

Assign devices according to the determined device allocation principles so that the devices and the host can work in parallel and provide users with a good device usage interface.

4. File management

Effectively manage file storage space, rationally organize and manage the file system, and provide effective methods and means for file access and file protection.

5. User interface

The interface through which users operate the computer is called the user interface (or user interface). Through the user interface, users only need to perform simple operations to implement complex application processing.

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