Operating System as a System Software:
An operating system is a system software that manages computer hardware and software resources and provides common services for computer programs. It is an essential component of a computer system that acts as an intermediary between the hardware and the user applications.

Function of an Operating System:
1. Resource Management: An operating system manages computer hardware resources such as memory, CPU, storage devices, and input/output devices. It allocates these resources to running programs efficiently.
2. Process Management: It manages processes or tasks running on the computer. It controls the execution of programs, multitasking, and scheduling of tasks.
3. Memory Management: The operating system allocates memory space to programs and ensures that they do not interfere with each other's memory area.
4. File System Management: It organizes and manages files stored on the computer's storage devices. It provides file access, storage, retrieval, and organization.
5. User Interface: Operating systems provide a user interface through which users can interact with the computer. It can be a command-line interface or a graphical user interface.
6. Security: An operating system ensures the security and protection of the computer system and user data. It controls access to resources and prevents unauthorized users from accessing sensitive information.

Conclusion:
In conclusion, an operating system is a crucial system software that enables users to interact with the computer and manages the hardware and software resources efficiently. It plays a vital role in ensuring the smooth functioning of the computer system.