What is os and function of os?

An operating system (OS) is software that acts as an intermediary between computer hardware and users, managing hardware resources and providing a user interface. Its primary functions include managing system resources (like CPU, memory, and storage), facilitating file management, and enabling communication between software applications and hardware components. Additionally, an OS provides security and access control to ensure safe operation of the system. Examples of operating systems include Windows, macOS, and Linux.