What is an operating system from a user's perspective?

From the user's point of view, the operating system is the "interface between the user and the computer." An operating system is a set of interrelated system software programs that governs and controls computer operations, uses and runs hardware and software resources, and provides public services to organize user interaction. From the perspective of a computer user, the operating system is a virtual machine that hides the details of hardware operations, isolates the user from the hardware details, and provides an interface to the user to facilitate the use of the computer.

#The operating environment of this tutorial: Windows 7 system, Dell G3 computer.

From the user’s point of view. The operating system is the interfacebetween the user and the computer.

The operating system (English: Operating System, abbreviation: OS) is a set of interrelated system software programs that supervises and controls computer operations, uses and runs hardware and software resources, and provides public services to organize user interaction. According to the operating environment, operating systems can be divided into desktop operating systems, mobile operating systems, server operating systems, embedded operating systems, etc.

From the perspective of user convenience, the operating system is a virtual machine, which is the first expansion of computer hardware. It hides the details of hardware operations, isolates users from hardware details, and provides users with interfaces to facilitate users. Use a computer.

In a computer, the operating system is the most basic and important basic system software.

• From the perspective of a computer user, the computer operating system embodies the various services it provides;

• From the perspective of a programmer Say, it mainly refers to the interface or interface for user login;

• From the perspective of a designer, it refers to the connection between various modules and units.

In fact, the key task in the design and improvement of a new operating system is the design of the architecture. After decades of development, the computer operating system has evolved from a simple control system at the beginning. The loop has developed into a more complex distributed operating system. Coupled with the increasingly diverse needs of computer users, the computer operating system has become one of the complex and huge computer software systems.

The main functions of the operating system

The computing operating system can be said to be very important to the computer. From the user's point of view, the operating system can have a significant impact on the computer system. Various resource sectors carry out scheduling work, including software and hardware equipment, data information, etc. The use of computer operating systems can reduce the work intensity of manual resource allocation, and the user's intervention in computing operations is reduced, and the computer's intelligent work efficiency can be achieved A big improvement. Secondly, in terms of resource management, if multiple users jointly manage a computer system, there may be conflicts in the information sharing between the two users. In order to more reasonably allocate the various resource blocks 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 optimal adjustments to the efficiency and degree of use of each resource block so that each user can All needs can be met. Finally, with the assistance of computer programs, the operating system can abstractly handle various basic functions provided by computing system resources, display operating system functions to users in a visual way, and reduce the difficulty of using the computer.

The operating system mainly includes the following functions:

①Process management, its work is mainly process scheduling. In the case of a single user and a single task, the processor is only for one user. Exclusively for one task, the work of process management is very simple. However, in the case of multi-programming or multi-user, when organizing multiple jobs or tasks, it is necessary to solve the problems of processor scheduling, allocation and recycling.

② Storage management is divided into several functions: storage allocation, storage sharing, storage protection, and storage expansion.

③Device management has the following functions: device allocation, device transmission control, and device independence.

④File management: file storage space management, directory management, file operation management, and file protection.

⑤Job management is responsible for processing any requirements submitted by users.

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