The operating system provides a range of primary services for both the system and user. For the system, the operating system provides resource management, which includes managing CPU time, memory, and input/output operations. The operating system also provides process management, which handles the starting and stopping of programs, as well as scheduling tasks based on their priority levels. Additionally, the operating system provides file management, which includes the creation, deletion, and modification of files and directories, as well as managing access to those files.

For the user, the operating system provides a graphical user interface (GUI) that allows users to interact with their computer in a more intuitive way, using windows, icons, and menus. The operating system also provides a command line interface (CLI) that allows experienced users to interact with their system via typed commands. In either case, the operating system performs a range of services to make using the computer easier, safer, and more efficient, including virtual memory management, support for multiple users, and the management of drivers and system resources.
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