The most basic and core software in computer system software is the "operating system". The operating system is the most basic system software that runs directly on the computer hardware. It is the core of the system software. Only the hardware devices of the computer with the operating system can be called, otherwise the computer cannot be used.
The operating environment of this tutorial: Windows 7 system, Dell G3 computer.
The most basic and core software in computer system software is the "operating system".
The operating system (operation system, referred to as OS) is a computer program that manages computer hardware and software resources. The operating system needs to handle basic tasks such as managing and configuring memory, determining the priority of system resource supply and demand, controlling input and output devices, operating the network, and managing the file system. The operating system also provides an operating interface for users to interact with the system.
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, it mainly refers to the interface or interface for user login; from the perspective of a designer, it refers to Connections between various modules and units.
In fact, the key to the design and improvement of a new operating system is the design of the system structure. After decades of development, the computer operating system has developed from a simple control loop at the beginning to a more complex one. Distributed operating systems, coupled with the increasingly diverse needs of computer users, computer operating systems have become one of the complex and huge computer software systems.
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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