Operating system (English: operating system, abbreviated as? OS) is a computer program that manages computer software and hardware resources, and it is also the kernel and cornerstone of a computer system. The operating system needs to deal with basic affairs such as managing and configuring memory, determining the priority of supply and demand of system resources, 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.
Extended data:
The operating system is divided into four parts:
1. driver: directly controls and monitors the lowest part of various hardware. Their duty is to hide the details of hardware and provide abstract and universal interfaces for other parts.
2. Kernel: The core part of an operating system, which usually runs at the highest privilege level and is responsible for providing basic and structured functions.
3. Support library: (also called "interface library") is a series of special libraries, whose responsibility is to package the basic services provided by the system into the programming interface (API) that can be used by the application, which is the closest part to the application. For example, GNU C runtime library belongs to this category, which encapsulates the internal programming interfaces of various operating systems into ANSI C and POSIX programming interfaces.
4. Peripheral: The so-called peripheral refers to all other parts of the operating system except the above three categories, and is usually a component used to provide specific advanced services. For example, in the microkernel structure, most system services and various daemons in UNIX/Linux usually fall into this category.
References:
Baidu Encyclopedia-Operating System