What is an operating system? What are the main features of the operating system? What are the main functions?

Operating system is a large-scale program system, which is responsible for the allocation and use of software and hardware resources of computer system, controlling and coordinating concurrent activities, and providing user interface, so that users get a good working environment.

Features of the operating system:

1, concurrent 2, share 3, uncertainty

Add:

The main functions of the operating system include three aspects:

1. Implement management and scheduling of system resources

2. Control and coordinate concurrent activities

3, external provide user interface.

System resource management and concurrency activity control are the core functions of the operating system, and these two parts are interrelated and inseparable.

What is an operating system? What are the main features of the operating system? What are the main functions?