What is the main job of operating system?

The main job of an operating system is to manage the hardware and software resources of a computer system. This includes tasks such as managing memory, controlling input and output devices, scheduling tasks, and providing a user interface. The operating system also acts as an intermediary between the user and the computer hardware, allowing users to interact with the system and run applications. Additionally, the operating system ensures that different software applications can run simultaneously without interfering with each other.