What is the role of a computer operating system?

Managing computer hardware and software, and most importantly, the computer operating system is a bridge between people and computers, and we can easily use computers without having to deal with the internal structure of computers. As for hardware and software, all system resources are handled by the operating system for us. Without an operating system, our computers cannot be used.

Boring. Don't copy the definition.

It didn't work. It should be in its own language.

The operating system is the first layer of software installed on the computer hardware, which can help users allocate and use resources reasonably, making the user operation simpler and smoother.

They simplify the complex operation, the graphics of the Windows system are more user-friendly, and all the operations are simplified to the operation of the mouse, so that even if the user does not understand the execution principle of the computer, he can use the complex functions of the computer.

The operating system of the computer makes the computer more user-friendly and makes the operation more convenient!

The operating system, as the name suggests, is used for operation. How can a computer operate without an operating system, so a computer must have an operating system. With the operating system, the computer can be used conveniently!!

A computer operating system is a program that runs on the hardware layer and provides some interfaces.

And. Application environment. And there is.

Expand your hardware. Function.

To put it simply, it is the medium of human-machine communication.

It is the basis for all hardware functions.

The main thing is to provide a platform for you to operate on this platform, just like if you want to write, he will arch a table for you.

It is a software that works with all the hardware facilities. It also enables individual users to provide an interface for operation... Thank you.

Computer (computer), commonly known as computer, is a modern electronic computer used for high-speed calculation, which can perform numerical calculations, logical calculations, and also has the function of storage and memory. It can run according to the program and process massive amounts of data automatically and at high speed.

of modern intelligent electronic devices, then computer operating systems.

What are the main features?

1. The main functions of the operating system are resource management, program control and human-computer interaction. The resources of computer systems can be divided into two categories: equipment resources and information resources.

2. Device resources refer to the hardware devices that make up the computer, such as the processor.

Main Storage, Disk Storage, Printers, Tape Storage, Monitors, Keyboard Input Devices, and Mouse, etc. Information resources refer to all kinds of data stored in a computer, such as files, program libraries, knowledge bases, system software, and application software.

3. The operating system is located between the underlying hardware and the user, and is the bridge between the two. The user can go through the user interface of the operating system.

Enter a command. The operating system interprets commands, drives hardware devices, and implements user requirements.

That's it for the introduction of what the main functions of a computer operating system are.

Key features of the operating system:

1. Process management.

Resident programs and applications.

The Dumin mask runs on a process basis. When computers adopt the von Neumann structure.

, each CPU can only run a maximum of one process at a time.

2. Memory management.

The memory management of the operating system provides functions such as finding available memory space, configuring and freeing up memory space to bridge noises, and swapping memory and low-speed storage packs. This feature, also known as virtual memory management, dramatically increases the amount of memory available to each process.

3. Disk and file system.

There are many types of built-in file systems for operating systems. For example, Linux has a very wide range of built-in file systems such as ext2, ext3, ext4, reiserfs, reiser4, gfs, gfs2, ocfs, ocfs2, nilfs, and google.

File system. Linux also supports non-native file systems such as XFS, JFS, FAT family, and NTFS.

4. Network. Many modern operating systems are capable of operating with the most popular Internet communication protocols.

5. Safety. The operating system provides direct or indirect external access to some resources, such as files on local disk drives, protected privileged system calls, users' private data, and services provided by programs running on the system.

6. Internal communication security.

Internal Information Security.

It can be seen as a means of preventing running programs from arbitrarily accessing system resources. Most operating systems allow ordinary programs to directly manipulate the computer's CPU, so there are some problems, such as how to force a program to stop, an operating system that can handle transactions and run the same special instructions, in this case, the operating system is just another parallel program.

CPUs produced for general-purpose operating systems typically implement some level of special instruction protection concepts at the hardware level. Programs with lower privilege levels are often prevented from running special instructions, such as direct access to external devices such as hard drives.

7. User interface.

Most operating systems today include a graphical user interface.

gui）。Some older operating systems tightly integrate the graphical user interface with the kernel, such as the earliest Windows and macOS implementations.

8. Driver. Driver.

devicedriver) is a type of computer software designed to interact with hardware. It is usually a well-designed device interaction interface, which provides the device with the function of sequencing and receiving information through a computer aggregation subsystem or a traffic leakage subsystem connected to the hardware. and eventually deliver the message to the operating system or application.

The use of computer operating systems is to manage user files and facilitate user access.

Synopsis of computer operating systems:

The location of the operating system is the interface between the user and the computer, as well as the interface between the computer hardware and other software.

The functions of the operating system include managing the hardware, software and data resources of the computer system, controlling the operation of programs, improving the man-machine interface, providing support for other application software, etc., so that all the resources of the computer system can play a maximum role, providing various forms of user interface, enabling users to have a good working environment, and providing necessary services and corresponding interfaces for the development of other software.

In fact, the user does not need to touch the operating system, the operating system manages the computer hardware resources, and at the same time allocates resources to the application according to the resource request, such as: dividing CPU time, opening up memory space, calling printers, etc.

There are quite a lot of types of operating systems, and the operating systems installed on various devices can range from simple to complex, which can be divided into smart card operating systems, real-time operating systems, sensor node operating systems, embedded operating systems, personal computer operating systems, multi-processor operating systems, network operating systems, and mainframe operating systems. There are three main types of applications: desktop operating systems, server operating systems, and embedded operating systems.

From the user's point of view, the operating system can carry out scheduling work on the various resource plates of the computer system, including software and hardware equipment, data information, etc., the use of computer operating system can reduce the intensity of manual resource allocation, the user's operational intervention in computing is reduced, and the intelligent work efficiency of the computer can be greatly improved.

In terms of resource management, if multiple users jointly manage a computer system, then there may be conflicts in the information sharing between the two users.

In order to more reasonably allocate the various resource plates of the computer and coordinate the various components of the computer system, it is necessary to give full play to the functions of the computer operating system, and make an optimal adjustment to the efficiency and degree of use of each resource plate, so that the needs of each user can be satisfied.

Finally, with the assistance of computer programs, the operating system can abstractly process the basic functions provided by the computing system resources, and show the functions of the operating system to users by visual means, so as to reduce the difficulty of using the computer.

Computer operating system: the heart and cornerstone of a computer system.

The operating system is what we usually call the system installed on the computer, without it, the computer is the same as nothing, nothing can be done, in layman's terms, it is the thing that makes the computer work.

1.Processor management. The most basic function of processor management is to handle interrupt events.

The processor may be one, or it may be many, and different types of operating systems will have different scheduling strategies for different situations. Also called process management.

2.Memory management. Memory management mainly refers to internal memory.

management. The main task is to allocate memory space, ensure that the storage space occupied by each job does not contradict, and ensure that each job does not interfere with each other in its own storage area.

3.Device management.

Device management refers to the management of various peripheral devices in charge of data and information training. The main task is that when the user uses an external device, it must be requested and can only be used after the operating system has been uniformly assigned.

When a user's program runs to the point where a peripherals are used, the operating system is responsible for driving the peripherals. The operating system also has the ability to handle peripheral interrupt requests.

3. Document management.

File management refers to the management of information resources by the operating system. In the operating system, the part of the administrative information that is responsible for accessing is called the file system.

Operating systems generally provide a powerful file system, and some also provide a database system.

to achieve information management.

4. Job management. Each user requests a computer system.

A separate operation that is done is called a job. Job management includes the input and output of jobs, and the scheduling and control of jobs (the steps that control job runs according to the user's needs).

The operating system plays two important roles:

1.Manage a variety of resources in the system. All hardware parts are referred to as hardware resources. And information such as programs and data becomes software resources.

2.Provide users with a good interface.

The main goal of configuring an operating system on a computer system is first and foremost related to the size of the computer system. Generally, for the OS configured in large and medium-sized computer systems, because the computer is expensive, they pay more attention to the effectiveness of the machine, and they also hope that the OS has very strong functions.

However, for the computer operating system configured in the microcomputer, because the micro-mill is relatively cheap, the effectiveness of the machine is not so important at this time, and people are more concerned about the convenience of use.

Another important factor that affects the primary goal of an operating system is the application environment of the operating system. For example, for the operating system of the application in the query system, the user's requirements for response time should be satisfied; For example, for the OS used in real-time industrial control and control environment, the OS is required to have real-time and high reliability.