What is an operating system? What is included?

Operating system is a computer program that manages and controls computer software and hardware resources, and it is the most basic system software that runs directly on "bare metal".

It mainly includes process management, memory management, file system, network communication, driver and so on.

Operating system is the interface between users and computers, and also the interface between 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 program running, improving the man-machine interface, providing support for other application software, making all the resources of the computer system play their roles to the maximum, providing various forms of user interfaces, enabling users to have a good working environment and providing necessary services and corresponding interfaces for the development of other software.

Extended data:

For hardware functions, such as input/output and memory allocation, the operating system acts as an intermediary between the program and the computer hardware, although the application code is usually directly executed by the hardware, which often causes the system to call or be interrupted by the operating system function. There are operating systems on many devices, including computers-from mobile phones and video game machines to network servers and supercomputers.

Early computers were used to perform a series of single tasks, such as calculators. In 1950s, basic operating system functions were developed, such as resident monitoring function, which can automatically run different programs and speed up processing.

For ordinary mobile phone operating systems, mobile phone operating systems are mainly used in smart phones. Do mainstream smartphones have Google? Android and Apple's iOS, etc. Both smart phones and non-smart phones support JAVA. The main difference between smart phones and non-smart phones lies in whether they can be extended based on the system platform.

References:

Baidu Encyclopedia: Operating System